Help me choose a muffler

I'm currently running flowmaster delta 50s on a 2.5" system. Tti headers, h pipe and full tailpipes behind a 500+ hp stroker. I've been reading on how restrictive my current mufflers are so would like to free up some ponies. Out of these three, which one would have the least drone and cab noise ?
Borla proxs
Magnalow
Hooker max flow