Get a 50". Almost no one ever says they bought one that was too big but a lot of people regret not buying a bigger one. I got a 50" 720 Panasonic for the living room and my wife picked out a 42" 1080 Panasonic for the bedroom. The 50 was $1200 and the 42 $900 at costco, which I recommend. Unless you watch mostly Blue Ray I don't think you will see a difference between 720 and 1080.