Overpower that SUB!!!!
Yeah its a crazy recommendation, but im pushing 150w into a 75w sub, and it sounds as good as any single 10 or 12 inch sub. Also in a bandpass box.
I will not give you any specific recommendation, but I sure can recommend you look at the numbers. Wheres the most power? How much does your sub handle? whats the freq response of the amp? and so on.
Again OVER POWER THAT PUPPY.