Since you are mainly using the sub for movies, you'd want to go with the EP350 or up in Axiom's lineup, imo. If you go with a competitor's sub, I'd look at something powered by a 300w or better amp, such as SVS, HSU, Outlaw ect. You should be able to find something quite good in around the $500ish range I would think.

Half of communication is listening. You can't listen with your mouth.