3 things..
...
Price.. 500 - 600 range, or 800 - 1000 range.
Weight and balance, point to aim, most natural feel, both in grip, and arm's, as if, part of your body..
800 -1000 bucks: Sig P229 Carry
CCW size, and I would say, yep Sig P229 Carry is an awesome gun, and would agree that SAO is far better than DA/SA. But if you want DA/SA, then it can be had in Sig P229 as well, but so is the Beretta Px4 40cal.
500 - 600 bucks: Beretta Px4 40cal
But, be sure and look, and feel, the Px4 40, both in those areas mentioned above, and the big difference in the DA/SA trigger pull weights of both. You'll find the Beretta is about a pound lighter in both modes, making for a beautiful, sweet, smooth, DA and SA feel.
LS
PS. IIRC, if you go with a P229 40cal Carry, I think you can swap barrels, and have a 357 sig, or swap barrels and mags and have a 9mm, as well, for a 3 in 1 gun, at a fraction of the price of all three in separate guns.