You may all know but Cabelas has the M&P in .40S&W for $429.99. I'm not sure how that compares to other places around here but I thought I would give a heads up. Also, if you buy that one, there is a manuf. rebate that you can send for 2 additional M&P mags for free from S&W.
That seems like a great deal: M&P and 4 mags for $430. If I hadn't just bought the G23, I would've probably jumped on this one. I like mine just fine, though.