I haven't used a KA or Breville FP but I can speak to the Breville quality.  I have a Breville Bread Machine and a Breville coffee grinder.  They seem to be very well made and knock on wood I haven't had any real issues with them.  The coffee grinder is used every day and the bread machine has been getting a lot of use lately and it hasn't skipped a beat.

As far as FP are concerned.  I have burned out a number Cuisinart FP over the years.  I like one I had because it had a really nice pasta maker that sat on top and made great pasta but the quality isn't there.  They don't seem to be made for heavy use.  I finally got tired of burning them out and bit the bullet and bought a Commercial Robot Coupe.  I watched them on eBay and found a really good deal on one.  Someone was closing a restaurant and the machine did not have a lot of use.  I paid less than half of what they are new.  It's a beast!  I suspect I won't be buying another.  I think I paid around $400ish for it which is what I suspect you'll pay for the Breville or close to it.  If you can get past the fact that it won't match your other things it might be a good option.  I'm really glad I did it.  They are made for the long haul.

I’ve always just made pasta by hand the old fashioned tried and true way.  It’s not hard, and kind of therapeutic to work the dough.  

If you have a pasta maker (the machine with the rollers and cutters, either hand cranked or on your Kitchenaid) this also works the dough to help refine it as you run the dough thru it until you achieve the thickness you want.

Making pasta by hand doesn’t take a long time and is sure easier cleanup than cleaning a machine.  If you’ve never tried it before Thomas make a small batch and see what you think.

Eddie

If you are making that must pasta dough each week I would really consider going the commercial route.  I don't think home machines are designed for that kind of work.  With so many restaurants closing right now I know you could find a nice Robot Coupe for a hugely discounted rate.  That's how I got mine about four years ago and the thing is a beast.  It will do all the pasta dough you want.  I considered the Magimix when I was looking because they are made by Robot Coupe but then I realized I could get a commercial machine for about the same money and I knew I wouldn't use the extra attachments.  Mine has the continuous feed slicing, shredding, dicing and all that stuff.  I use the dicing a fair amount but don't seem to do much slicing and shredding.

My last FP before this one was that huge Cuisinart with the three bowls, etc. and I never used them.  I don't know if you would but it's just another thing to consider.  That Cuisinart didn't last but a couple of years and they wouldn't do anything about it.

Kitchen Aid, today, is all about the look and not about the durability.

Sadly.

You get some really well engineered stuff and then there's the trash when some bean-counter has taken a really well-engineered product and raped it.

Nothing to be done about it, they're Whirlpool which, in 2020, is another word for trash.

Buy Hobart or Breville. Or, get a light duty commercial pasta maker. Light Duty will cover your needs perfectly for years.

I'm so mad at KA for their trashy mixers, I'm done with anything after their takeover for good.

I use a food processor primarily for bread dough and would have no other than the Cuisinart Custom 14 (14-cup capacity). It is also the top-rated processor by America’s Test Kitchen. Price is around $200. (Note: Other Cuisinart models score lower than the Custom 14.)

The 12-cup Breville BFP660 is next on the list; price around $300.

 CR’s top-rated model is the 16-cup Breville BFP800XL/A with an overall score of 81. Don’t think they test the machines on bread dough, anymore, unfortunately. Price is upwards of $700. The 12-cup Breville BFP660 is further down the list, with an overall score of 64. Price around $300.

KitchenAid processors are middle-of-the-pack at both CR and ATK. Had one back in the early 2000s, and frankly, have no desire to try the brand again. Didn’t have the muscle for bread dough.

I had the Cuisinart (I think the 14 cup) it had the three bowls and the attachment caddy.  I don't have it anymore so I attached a photo.  I had nothing but trouble with it.  When I tried to make any kind of heavy dough in it (usually pizza dough) the lid would disengage and the machine would stop.  The controls didn't work half the time.  The pulse button would stick so if I was pulsing an onion for example I had to hold on to the plug to pull it because I never knew when it would stick.  I gave it to a friend of mine who was going to tinker with the controls to see if he could fix it.  He told me it didn't fail for him as often as it did for me.

I know they are supposed to be good machines and most likely I had a lemon.  This was at least the third Cuisinart I had over the years.  Cuisinart wouldn't do anything about the failing controls because I had just exceeded the warranty.  And back then I know I paid over $300 for it.  This is when I finally decided to bite the bullet and go for the commercial machine. 

The only Cuisinart food processor to own is the Custom Classic 14 pictured below. Nearly all the newer, fancier Cuisinart models--as you pointed out, Ralph--are middling performers at best. 

Reminds me a bit of Speed Queen's strategy. The performance of their redesigned TR top-loader did not impress SQ aficionados, so Alliance soon made one of the classic models available, as well.

While I'm generally the first in line to try a brand's latest offerings, the above-mentioned are two instances in which the "classic"designs are the better performers.

That likely explains why I had the experience I had with it.  It was clearly not made as well as some of the older machines I had and a disappointment.  Now that I think about it, I may have bought that off of QVC but I can't be sure as its been a number of years.  If I did that makes sense because it seems some of their products (not all) look like a higher end model but aren't quite the same.  

These little guys have been around forever and are tough as nails. 

WK78

I have a Breville food processor and have been very pleased with it.  I've never made pasta but I make pie crust and bread dough in it often and it has been a solid performer. 

According to the user manual occasional washing in the dishwasher is OK.  I take this with a grain of salt.  I have a number of items in my kitchen that "don't recommend" washing in the dishwasher and they come out fine.  One that comes to mind is my Vitamix blender jar.  Some say it's OK, some say never, so about once every couple of weeks I run it through the dishwasher because it does a better job than their recommended method.  It's almost 10 years old and still going strong.

Maybe run it through the dishwasher only when you have something really, really messy or sticky that would be a pain to wash in the sink.  If your dishwasher has a hidden heating element in the bottom you're likely fine to put it in the bottom rack too.  Another option might be let it go through the wash and rinse and pull it out before the dry if your dishwasher has an element that heats up for drying.  Maybe the bowl will cloud or something and if it does it will just look used and loved and there is nothing wrong with that.  They probably say don't put it in the bottom because they have to allow for the "lowest common denominator" which is a machine with an element that goes to a million degrees for drying.  :)

My robot coupe also says to hand wash and I've been running it through the dishwasher since the day I had it.  No issues.

Enjoy your new machine!!