I don't have my Beretta logs with me but I'm certain I've put over 20,000 through at least one 92G. All together I've probably shot somewhere between 80-100,000 rounds through Berettas.
I'd pick the M&P over the Beretta in a heartbeat, especially as a CCW gun, but if the Beretta is what you want it will absolutely serve you well.
You'll need a good gun belt (which you should have regardless of which gun you get). You'll need a well designed holster (which you should have regardless of which gun you get). You'll need to learn the particular manual of arms from someone who truly understands how that particular gun is gun (which you should do regardless of which gun you get).
Though they can be harder to come by, I'd suggest trying to track down a 92G Compact, which uses a shorter 13-round magazine. It's just as wide as a full-size Beretta but it's about half an inch shorter at the muzzle and a little bit shorter at the butt.