Right, I meant to mention that - the ten-year warranty is on the motor. Parts are three years.
I once broke the motor on my cousin's old Cuisinart, years ago (when they were supposedly making them better, before they were purchased by Conair), just by grating cheese. We could have used the ten year warranty then! They weren't providing them in those days. Strange - now that the quality is supposedly inferior, they're providing longer warranties. I imagine they think it still costs them less in the long run.
I don't know what to think about the relative quality of the two lines. Someone at Amazon said that a salesperson told her that Sabatier used to make the blades for Cuisinart, but is no longer doing so, and I think she said that they still are proving them for KA. But then, someone else said that the blades on the KA seemed flimsier.
People have been complaining about the leakage issue with KA's, but Cook's Illustrated did experience it and didn't seem to think it was that big a deal. Cuisinarts also have a problem with liquid, supposedly - more than about 2 cups, and it leaks out of the top. Their models have a line on the bowl telling you how much liquid you can add safely.
A friend has a KitchenAid and hates it. She told me that the cover closes differently than it does on a Cuisnart, and she finds it extremely difficult to operate. Macy's had a sale on the old DLC-8S ProCustom 11-cup model a couple of weeks ago; I picked one up for her for $100. She couldn't be happier. She won't even give the KitchenAid away, as she doesn't want someone else to be burdened with it - she hates it that much.
I did also check out the KitchenAid forum. It was very bizarre - they all seem to be fanatics. They just talk continually about how wonderful KitchenAid products are, and how clever they are to realize it. And they trash Cuisinart. Once in a while, someone will say, "Wait a minute, I have a Cuisinart this-or-that, and I think it's a good product.", and the rest of them will immediately jump all over him or her and say, "Just wait until you have to call customer service!", or some such thing. It's a cult-like atmosphere; I found it very off-putting.
Something else as well - KA does offer more accessories than Cuisinart does - except for the 7-cup model, for which, as robgrave pointed out, they only offer the one blade and two discs. They do offer a citrus press, but no other blades or discs. I looked at their site; you can't even order a replacement if you break one of the discs; only the blade is available. If I were to go with the KA, I'd have to get the 9-cup model. Cuisinart, on the other hand, offers a full range of attachments (although not as many as KA) on all of their models except for the 3-cup ones - the Mini Prep and Handy Prep.
KA just seems to be a strange company.