I certainly don't want to talk you out of trying you hand at competition shooting, but none of the guns mentioned, lend themselves particularly well to competition. They can be used in competition, but each has its drawbacks. Continual drawing from a holster, will certainly mar the fine finishes on your Python and model 27. Either are acceptable for ICORE, classic division, but if they were my guns, I would keep them for range use only. I don't believe the M&P has enough capacity to allow you to be competitive. You could use the M&P for IDPA and USPSA but you will need to reload more often than your competition, thereby slowing you down, and making you less competitive. I suggest you consider the purchase of a full size M&P in 9mm. That will allow you to compete in IDPA, USPSA (production division), as well as shooting steel. OH, and by the way this competition thing is highly addictive. I started out shooting steel, when that wasn't enough, I added USPSA, then I wanted still more so tried my hand at IDPA, and ICORE. I ended up selling both a 4" nickel model 27 and 4" nickel model 29-2 to help fund guns specifically geared toward each type of competition I was involved with. One gun you don't mention is a 22. A good .22 semi auto rifle or pistol is a great way to get into shooting steel. Plus I recommend static steel as a great way to start competing. There is no foot movement, but you get practice drawing from a holster, and transitioning from one target to another. Once you master those basics, moving into IDPA, USPSA, and ICORE is a little easier.