I started out with the 350 and thought that was a great sub for music. For watching movies, after reading all the posts about LFEs and "feeling" the tremors and shakes, I didn't think it was delivering on that end. I contacted Axiom and we arranged an upgrade. The 500 was a good improvement in the music arena but where it really shinned, at least for me, was HT. No I can relate to those "feeling" posts.

Go with the 500. You won't be disappointed and you'll sleep better at night.

Axiom stuff, Denon stuff, & Sony stuff