The USP is the best pistol you can get if you want a cocked and locked 1911 sytle pistol in polymer/various calibers. I have a fullsize 9, and I LOVE it. It is relible, accurate, and just feels good to shoot. It is thin, and very easy to conceal in an IWB at 4 -5 o clock.
I wouldnt get the USP in any variant but one (or if there are others that let you carry C&L) If you want a DAO, buy a Grock or something like that, the DA HK trigger sucks out of the box, though with some polishing, there is an improvement.
My choice between a P2K and a USP would go USP all the time. Though, if you really want the LEM trigger, that's your preference, and I guess I wouldnt know.
You seem to be alright with carrying in condition one, I think it is the best way to carry and I do it all the time. Some people fool themselves into thinking a "safe action" Glock is safer than a C&L 1911 style pistol. Laughable!