Change recievers and the sound will pretty much be the same… Very small difference.. you go with the ep500 vs. the 350, night and day, I went from an ep350->ep600 and you cant even compare the 2.. as a whole system, well it was like a whole different home theater with the 600, vs the 350.. with the 350 it would bottom out some times, depending on the movie. Finding nemo, you could hear the thump, and master and commander you could “hear” the cannon fire.. but with the 600, finding nemo your whole body would shake with the 600, and master and commander, you could feal the cannon shots deep inside your body…
So, 350-600 one is a home theater, the other is better than movie theater, theater.. same thing with the ep500, very small difference between the 500 and 600.. so for a “more” movie theater feel, less home theater feel, go with the 500…
