Paul and I have been living in the stone ages: we’ve not yet upgraded to high definition television. We bought a 52″ set back in 2001, when HD was way too expensive. We’ve delayed the upgrade as prices dropped so as to get more value from that purchase. But now, with the upcoming NFL season approaching, I just can’t stand it. We’d like to get another large screen — probably about the same size. Any recommendations for buying? Any features that we definitely must have?