Kitchen Aid 600 at Williams Sonoma. It's high capacity--great for doubling recipes--and professional grade. Can also buy attachments for pasta making, sausage making, etc.
I've had it for years, it replaced the Kitchen Aid we had bought at Sam's Club (motor burnt after 2 years). Apparently, not all mixers are made the same, even if it's the same manufacturer.
My cousin found me the ka 600 at a second hand shop for $125 with all the attachments and it's been great. (series that retails for about $500-600 at the stores) use for everything cookie dough, icings, batter. love it!!
I have 2 Kitchen Aides... my standard one that I use almost every day for something... and my Big 6qt machine that I LOVE! I can make enough buttercream to ice a 10-8-6" round cake in one batch. LOVE that because I hated making several batches. I'd swear by my KA's but... I have never used anything else. I have a hand mixer in a box.... in the back of the cupboard.... that never gets used.
My husband bought me a Kennmore Elite & it is fantastic. You can do double recipes & works good. I haven't had any problems at all & would suggest this to anyone. We couldn't afford the Kitchen Aid which I have always wanted but this must be the next best thing.