Some particular reason you 're only considering full-size pistols?
For myself I always prefer mid-size (Glock 19,23,32 or Sig 228,229,225 or USP compact 9 or .40). These sizes make for best all around guns. You can conceal them easily, should you wish to, and there is enough gun to make shooting pleasant. As already noted, I would go 9mm and pickup a .40 later.