How about a revolver? The S&W 610 is a great gun, so are the Ruger GP-100, Super Redhawk and Super Blackhawks in 10mm. If you're feeling really exotic, I've seen Chiappa Rhinos converted to 10mm Mag.
The up side to the revolvers is that you can load them to a longer OAL and see a significant performance increase over anything you'll get in a semi-auto. You get the added bonus of being able to run any ammo you want without having to worry about swapping out recoil springs.