Beretta 92fs. BUT depending on what you're doing with it, it's kinda big to carry. I really like mine, super accurate, low recoil, and easy to shoot...but I never carry it.
I didn't see anything requiring this to be strictly pistols. I like the Smith 686 and I just picked up a DW 15-2 that is awesome. Also really like the CZ 75 and P01.
I really need to get a Sig, I have no experience with those
The CZ and clones: CZ 75B40 S&W SAR K2 45 ACP Canik Shark 9 mm The SIGs: P220 45 ACP P6 9 mm P224 40 S&W Others: Beretta 92F 9 mm High Power 9 mm Kahr K9 9 mm Markarov