Yeah, maybe change to M60's and get a really big SVS sub (such as the PB+) or get the HSU VTF-3 MK2 Sub (now in a high gloss finish). It costs a little more, but they are more powerful subs than the Axiom EP350.

Otherwise, with Axiom, you really can not go wrong.

Have fun, your system is going to be mindblowingly good.