Well, that's completely understandable, Bob. However, you must understand that you will probably never get "good" sound quality from speakers placed in such a way you have them. Still, keep your priorities if you must, else move them into a dedicated room or something. I am also a bit of a videoholic, and I know how important it is to have a quality screen. However, a TV your size will not be too close for viewing from the couch if you moved it against the flat wall. Also, you could also mount it, which frees up the space below it to hold audio components, allow the total system to protrude less into the room. I'd think the only thing that would stick out into the room would be the speakers, which ideally should be a minmum of 18" from the back wall.
Concerning the TV, I can PM you a link to an HDTV seating chart calculator if you'd like, but that's a totally different topic. Still, I assure you it wouldn't be too close, and would actually give you the best of both worlds because it would be a more enveloping experience visually and sound wise.
Anyway I know you may just not be able to accommodate anything I said, and if so just ignore me.
Good luck on your search and it's been a pleasure having you here at AC. Enjoy the GTG tomorrow (I will be attending one of my own, but it's a subwoofer GTG).
Take care!