I think that you'll find that "Production Class" is a class in USPSA competition for box stock pistols that fit in the "box", with modifications descibed in the USPSA handbook. IDPA and USPSA are both fun to shoot. When you start either don't plan on doing very well at first. Any game requires some experience and time. Just have fun and be safe. I use the Glock and it works. Two guys are shooting the new XDm 5.25 and doing well. I've shot the Beretta but it's not a competitive pistol and you won't see many use it. You may want to go to the IDPA and USPSA websites and see the rules on the pistols/holsters and classes. If you show up at a shoot I'm sure you'll be allowed to compete no matter what you are wearing. USPSA has a lot more latitude as to what you can shoot and is actually geared towards the "Race Guns". IDPA is more of a defensive real life competition. Neither is really "tactical" and both are games but they will teach you to think quickly, handle the pistol safely while doing so, and shoot well while moving and under stress.