iam looking to get the epic 60.350 or the epic 60.500 system for my area with the larger vp150 center channel.My room size is 18 x 19 with vaulted ceilings that go to 14feet. I would like to know if any body has had both the ep 350 and the ep 500. And if they noticed any improvement over the other and if it was worth the extra cash. Thanks for your help scott