how much are willing to spend on a amp?
i would get a amp that has at least the rms power into 4ohms, 600watts.
some guys run less, but it you want to get the best sound out of that sub feed it it's rms sundown,jl slash series,zapco dc, audison, brax,zed audio, i like these amps because of there flexablity to make any sub sound great.