Seems like the long-time shooters I have met are using the 5" guns, but they are hard to come by. I started with a 4.25" 40, and I am still using it, to which I have added an Apex AEK, Dawson FO front sights, Dawson fixed rear, and SSS ESP magwell. I just got my M&P 40 Pro last week and haven't shot it yet but plan to move forward with it and keep my original 40 as a back-up gun. Was told today by my gun guy that S&W currently has a contract with BATFE and a foreign government to provide them with weapons so guns are slow coming out of their facility right now