I bought a G19 for EveryDay Carry, and I kinda regret it. I have since experimented with the G17 and found I could conceal it just as well as the 19, but it's a highly individual decision.
I would recommend going to a gun shop and trying both models in various holsters to see what works for you.
ETA: I'm not a .40 guy either. Ammo costs more, higher recoil, lower capacity, arguable difference in effectiveness, shorter service life on guns...