When you want a different pistol you'll have to think about what you want to do with it. If it's just for looking at then things are wide open. Canadian Hi-Powers, CZ-75s, USP Tacticals, Lugers, Five seveNs, Glocks, are choices just to name a few.
If you want to use it in a game then you'll need a couple other things. First is a holster, if you get something like a broomhandle Mauser you could be really having a hard time hanging it off yourself. Second is spare magazines; at least one and some people will carry 4+. If you can't re-load you'll find your pistol experience to be pretty naff.
Then after the holster and mags you can think about stuff like internal upgrades or what have you. There's a great "post your pistol" thread here you can read over and get some ideas of what's' out there.
Seeing your other post up there just now I'd say a 226 is pretty big. Something bigger, reliable and easy to find would be a KWA USP Tactical.
Airsoft, where nothing is hurt but feelings.