I want a new tv, but I don't know which one to go with. I have a 52" old rear projection high def now. Looking to upgrade to a 60"-70" LED. I have about 12 feet from the wall to the couch. I have been told be a friend, that I'll need about 20 feet of viewing space if I go with the 70", not sure if that's true or not? Should I go with Sharp, Samsung, or LG? All suggestions are welcome, thanks!