Either my Kimber or my USP45c. Given my frame both of these are a little bulky for me to carry concealed.
Would have to be my XD .45
Probably a Smith and Wesson model 57 in .41 mag with an 8 3/8" barrel...
Seriously, same old Commander, I would be a bit more concerned with retention and perhaps us a (ick) thumbreak holster.
"Patriotism is supporting your country all the time, and your government when it deserves it." -Mark Twain