Check out Ga Gun Store in Gainesville. I got a S&W sport II for $539 plus tax (about $570 otd) a couple of months ago.
I was going to recommend them as well. It would probably be a good idea to call first and make sure they still have them in stock. CG&P had them last month for $549 but they sold out immediately after Orlando. I have no idea if they got some more. It couldn't hurt to call them either.
The M&P Sport II will probably be the best one that is closest to your price range. I'm on!y guessing, though. There may be some others that are comparable.