I also have 4 Glocks. I'd say the Glock 23 or 32 are great alternatives to the Sig Pros..
I normally carry the 1911, although fairly large, it is also fairly 'flat' and easy to conceal (I'm 6'4").
Having said that, and considering that we now have a .40, I'm thinking maybe I need the smaller framed 23 for daily carry... *uh, yes Dear, I think we really need another...* LOL!