Thank you all, for your thoughtful replies. It's great to be able to check with others on something like this. I didn't really need a new TV, the trend is towards thin screen TV's, and with the economic outlook..... Well, any way, my new Samsung HL61A750 was delivered today. Got it at CC for $1530.
I'll post more feedback after getting it dialed in, but my initial impressions are very good. I started out with 300, one of the free HD-DVD's I got with my Toshiba HD-A3. I watched the opening scenes, and really liked the detail. I put in The Incredibles, ran thru the video part of the THX setup, and watched part of the movie - quite nice. I watched a bit of football, and the colors were too much, so I've still got work to do.
I've been re-re-re..... reading The Lord of the Rings, and watching the parts on TV (extended edition) after I read them. Last week I watched the company try to cross the mountains after leaving Rivendell - the scene where their climbing up a snowy ridge. Much better detail with this set. If you see smooth white expanses, you're missing the details, which I never saw with my old TV.
My old TV was a 51" Sony CRT RPTV, and so far, I'm thinking I got my money's worth - this is a nice step up. Bigger is better, brighter is better, greener (led set, uses less power) is better, screen being less reflective is better.
The one big drawback I've found is that this TV doesn't have (or I haven't found) a good picture mode to fill the screen with 4:3 content. My 6 year old TV has a mode that squeezes the top & bottom, and stretched the left & right edges, and mostly leaves the center alone. This set just wants to do a simple zoom. Even if they can't make it better, I expected to get at least as good processing in a newer TV.