Would would be the best rear end/differential to use if upgrading to a LS3 engine with T56 ?

I have a 1969 Firebird and plan on swapping the original 350 engine with a LS3 engine with a T56 . The vehicle has the original differential, but I was looking at upgrading to something that will complement streetable modifications such as performance cam, injector and supercharger. What would be the best rear end for this type of modification. I want to burn'em up!