Y&P Mk23 Mod1 is good (from experience) but its hell finding a holster.
the P8 from YP I hear is ok, but I'm not sure since I havent tested it myself.
that pistol from Post #2... you can ram that thing in your rectum. back in my B&I days I had to sell those things for 15 dollars. I nearly threw up doing it.
if you go with the Mk23 though, make sure that you don't waste your time using the suppressor with it because that thing kills your accuracy (two inner barrels dont work together well when one does its own thing).