I bought a 42" Vizio LCD HDTV for $699 on TigerDirect.com. It came in perfect condition and works great. Total cost came in just over $800, but the $699 includes a $50 mail-in rebate and once I get that I'll have paid about $750. If you're going to buy online, MAKE SURE you check TigerDirect, NewEgg and other online discount stores. Do NOT be afraid to buy refurbished, especially if there is a warranty. In fact, I recommend reconditioned electronics exclusively. My television is refurbished and I also go an Onkyo home theater that retails at Circuit City for $799 for only $299 refurb online, plus about $50 shipping. You can just as easily get a brand new, $1200 TV shipped to you from a big box store and have it arrive broken.
I would also very much recommend going with an LCD over a Plasma... in fact, if you're getting it shipped to you, I would strongly advise you NOT to get plasma at all. Plasmas are fragile, heavy and both difficult and expensive to ship. LCD's are far more durable. At about 42" and up, the Plasmas might actually start getting a bit cheaper than the LCD's.
Also, don't get suckered into 1080p on a TV that's less than 50". At less than that size, and at a reasonable viewing difference, the difference in visual clarity from both 1080i and 720p is negligible. There is also no plans for programming of any kind to be shown in 1080p.
That HP LCD that slomo posted seems like a good deal, and it is... but I still think you can shop around and find a great deal on an LCD; and, like I said, I got Onkyo surround for $299. You can't beat that at all, and it all sounds and looks great.
I also encourage the Vizio and know people who love their Olevia's and Westinghouses. I have read some lousy reviews on the Westinghouse TV's and I don't know much about HP in the television business either. The thing to do though is to shop around, and be willing to buy online, buy off-brand and buy refurbished. If you've got money to burn, just buy a Sony Bravia.
If you're a battery, you're either working or you're dead....