Amazon has got a Kitchen Aid Professional 600 Series for only $259 today as the Gold Box special! You can combine this with the $50 Mail In Rebate that I told you about a few weeks ago to score this AWESOME mixer for only $209.
Walmart does not carry the 600 series, they carry the basic 4.5 quart for $199. There really is no comparison on this one. For $11 more you are getting a much superior machine. Plus, no tax ( for most of you) and free shipping.
You are NOT going to find a better deal on a better Kitchen Aid!