Accuracy and a lot of recoil are not exactly going to go hand in hand unless you plan to be able to take as long as you want between shots. Don't get me wrong, I don't mind a powerful gun, but a really well designed piece will fire the largest of rounds and eat the recoil so you can shoot multiple shots accurately.
If you want something you can customize you absolutely will not beat a 1911, however there needs to be a distinction in what you call customizing. Do you consider customizing to be grips and exterior "bolt on" stuff, or do you mean customized triggers, asthetics, internal components, etc.
Personally I'm not a huge fan of most of the polymer guns if for no other reason than they all seem to look alike, but that's just me.