has anyone mentioned .357 Sig? I havent read through all these posts, but let me recommend the Smith and Wesson M&P series, there have been countless independent tests against Glock, Springfield, etc, and they have outperformed them all and they cost around the same. I have over 10,000 rounds through both my .40 and my .357 compact w/o a single jam. If you want the knockdown of a .357 in a 15 rd. magazine, you cant beat it. It has more muzzle energy than both a .45 and .40
I also have an M&P AR15. Here are a few of my collection.
H&K USP Tactical and yes, it has a silencer.