Depends a lot on what you're budget is. If money wasn't factor, then I would go straight to Les Baer and get a long slide from him, and after that I would look into Dan Wesson Bruin if looking to keep it on a 1911 frame. Les Baer would be my absolute first option though. I personally carry a Sig 220 Elite Emperor Scorpion in SA/DA with the decocker, because I got an absolute steal on it, which I absolutely love. Worth a look as well.