Ok... lay it all down for me!

We want something that beats and whisks obviously. Shel makes a lot of doughs (pizza, bread), so the dough attachment is the majoring drawing card here, and she is also wanting to get in to make pasta for us (you know what they say, once you go fresh you never want to go back!).
The mincing is another bonus that we'd be interested in!
Because of Jazzy's intolerances to flabours, preservatives and colours we pretty much have to make most things at home by hand. We've been a bit boring but are wanting to do more (like the fresh pasta) and more sauces and homemade things. (blah Friday night, lost my words, but I'm sure you know what I mean)

What's the difference between Kitchenaid, Keenwood Chef, and Mixmaster? And what are the other things that they can do? Do they do anything else?