While I almost always agree with Hawkfish and say "get a Glock," I have to caveat that with "if it fits your hand well and you can shoot it accurately." That said, I have owned more Glocks than anything for three reasons: reliability, hand fit (if that's a real term...), and accuracy. If I were to go with a 9mm for carry, we would have a 34 or two at the house for comp and nightstand guns*, and I'd carry a 26 or a 19.
*As a side note, the sheer amount of effort that would require to convince my wife to switch makes it a long-term "if", or better yet, "if ever". Perhaps the rising cost of .45 ammo will change her mind.