Looking for some advice. I have an older P229 Stainless (black with rail) in 40 S&W. Absolute shooters dream. Installed a Sig SRT Kit, a Gray Guns adjustable straight trigger, and Hogue G10 Piranha grips. But... I am in love with the P229 Legion. Any advantages over what I have already done to mine? I think I want to swap to 9mm.