Well, I'll have to disagree with the SIG being better than the HK. Better trigger, yes, better reliability (and especially durability) no. And don't forget you can now have HK install the Match trigger group in newer USPs - I've heard really good things
.
My Beretta failed to lock back the slide after the last shot was fired. It wasn't the magazine or mag spring. When it was finally "fixed" it would lock back when there were still rounds in the mag. Got rid of it.
My wife's SIG would fail to extract about once a magazine, and got worse as it broke in. The worst kind of jam, as you need two (sometimes three
) hands to clear it. Just got it back from SIG - they replaced the recoil spring and tested it with ball and HP ammo, and said it works fine now. I'll know by Monday. BTW, this was a brand new pistol.
My USP40 has never, ever failed in any way, through thousands of rounds.
My brother's USP40 has never failed in any way, through a few thousand rounds.
My Kahr MK40 has never failed, through about 500 rounds.
So, from my *personal* experience, SIG and Beretta aren't as reliable as HK and Kahr. I don't have any personal experience with Glocks as I don't like the trigger. Of the weapons listed in the thread title, I'd go first with the HK, then SIG, then Beretta, then Glock. Just my personal choices.