I am one of the "only own one 9mm pistol" people...mine is an unusual choice resulting from accidentally purchasing a Norinco 213, (a Chinese civilian version of the Type 54 clone of the Russian TT-33), chambered for 9mm, which I mistook for one of the Tokarevs. (my bad!) Actually, I really enjoy shooting the 213 but wouldn't use it for a primary carry, but maybe a trunk gun.
After reading this thread, I am intrigued about the BHP, as I am mostly interested in steel framed guns with interesting histories. My only polymer framed gun is a Glock 23 (.40). I have also been wanting one of the 9mm CZ-75 varieties for a while, but currently only have a CZ-52 (7.62 x 25).
Haven't shot any from your list, so can't honestly vote on this one, but thanks for the fun thread. On second thought, I vote for the CZ.