If you are serious about not wanting extra thump & rumble for movies, there is no sense.
I got the EP350 as a music first sub. Didn't think sound for movies was that important. I am now finding that I enjoy movies much much more with good speakers and a sub.
You can always pick up the EP350, but make a point to watch a number of movies with good LFE during the evaluation period. If you find yourself constantly wondering what a better sub would sound like, you can still trade up to the EP500 at no penalty.
