Second question: HDTVs have digital tuners in them, so the RCA box that converts digital broadcast to analog signal won't be needed. Am I correct that HDTVs with digital tuners use coax input from an antenna?
UPDATE: It appears that HDTVs do use coax input for broadcast TV. The RCA 42LB45RQ (a 42" LCD screen) looks like my best choice on this right now. It has a variety of RCA jack inputs and outputs, including audio, which means that I would not need a converter to switch from digital coax to RCA jacks. Now I just need to make sure that the Blu-Ray player/NetFlix interface box has an HDMI connector. I can't imagine that it wouldn't, but it was a refurb when I bought it several years ago so you never know until you look.
UPDATE 2: All questions answered. I ordered the Sanyo 42" LCD 1080p and the HDMI cable from Wal-Mart's "ship to store" option, primarily because this model was in the store already. Yes, on Amazon it would have been $20 cheaper, but shipping would have made it more expensive, and I would not have seen it for a week or more. In four weeks, my wife and I will be back teaching, and our evenings will no longer be free.
UPDATE 3: So much for Wal-Mart inventory. They were out at the store that they said had it.