RE: Pistol $500 and under
now THAT was a steal for a gun. I bought an HK USP Compact for aout 800 out the door, and generally the Fullsize USP are more $$$$. That would be another GREAT suggestion if you can find a used H&K. Should be able to pick it up for less than the $500 you are looking to spend, and IMHO, it is better than allthe guns listed above.
I know, somebody is saying but, but, but you said buy a springfield, and I did, for $500 that is hard to beat NEW. ut if you can find an HK in good shape in that price, I would buy it in a heartbeat.
good luck.