Looking under your screen name I see a Ruger crest,,,,,,,,, I'm going to guess you'll be happiest with a Ruger, but that's just a guess. If you live in a 10 round state I would go 40, in a high capacity state it's a coin flip for me. I like the low recoil and low price of 9mm ammo. You can shoot the 9 faster than a 40, and it's very hard to beat speed and accuracy.