I just purchased the denon 3313ci and Def tech mythos sts speakers with gems and the mythos nine center. I have a ps3 for games and blu ray and the panasonic 65vt50 tv. It's all brand new and i don't want to make a mistake with my system. I think the tv and speakers are fine but I am not sure about the denon. Is it all that I need or should i go with marantz or pioneer? The towers have powered subs but we'll have an extra sub to hook up as well. I'm trying to do a little research but it's greek to me! Help, please.