Researching the topic is an interesting journey, bringing me across all sorts of different offerings.
Sure Kitchen Aids stand mixers are very popular, kind of a design icon, and might be the one with the best WAF/quality factor. I'm sure it will make a difference, especially their Pro Line (- and I comes in black, too!), and in many way it is the easy choice. But maybe too easy. I'm not sure if it has enough charm of raw machinery - and will it stand the test of time?
Swedish Assistent has a great prehistoric look 'n feel, and come with a huge bowl. It uses a rare rotating bowl system, and receives great reviews, and might also make up for a rational choice, but still I'm not sure if the rotating bowl is too weird, or if it actually will knead my precious dough.