1) Do I really need 7.1 for a room 14 x20? Seeing alot of good reviews for this system so what's the hitch? Does audio & video both go thru HDMI? If not, how much quality in sound do you lose? Is it an old model? Is the DVD player decent? I watch maybe one or two movies a month (maybe more with a better system) so what I really want is great audio watching HD stations. Thanks for your help!!!!