I have and odd kitchen aide that I got refurbished from Amazon. It was originally one sold by costco and sams club.Late to the discussion, but I have the large Kitchen Aide mixer that lifts the bowl up to the beater, the head is fixed. It is about 16 1/2" tall. I really like it - it is more powerful that the 5 quart one that I had. Which I gave to my sister who really loves it. The older one is over 20 years and still working great - they make bread a lot with it.
It is powerful and quiet-- it has a DC motor instead of AC. The drawback is that it is hard to get some of the after marked beaters for it. The accessories work fine though.