After two days, I'm still loving this TV and learning some ins and outs. It's an August build of the 55".
Watching HD Football - albeit CFL on World Sports - is absolutely fine. No artifact issues or motion blur. on ESPN2HD, a little bit, but I'm blaming that more on compression than the TV. SD football is ugly, but it should be. Still trying to tweak that by using an SV cable and softening it, but it still always seems like it's just out of focus, especially when compared to the HD feeds, which is as it should be.
OTA - what channels I can get - I have to upgrade my antenna to a Channel Master 4221, I think - is much better than my dish versions, which it should be. Watched a little of Las Vegas and Ghost Whisperer while working the antenna over and was very impressed. I do have an issue trying to get the sound to my receiver still with this. The optical feed doesn't send the Channel input anywhere.
Size - Yeah 55" is big, but sitting 8'-10' away I'm very impressed and not as overwhelmed as I had feared. I find I do get a bit of headache watching SD stations, which I'm sure is related to my eyes constantly trying to tighten up the picture, but I have no problem with the HD feeds. I'm surprised how clear old analog shows like Hogan's Heroes look on HDNet.
Gaming - using my Xbox, it works just fine. I need to calibrate a bit so a couple of teams look a bit less fluorescent, but I'm happy. It's a bit ( okay, a lot) jaggy, but that's with a 480p game - NCAA College Football. I popped in a 720p game and it was much much better. Looks like an XBox360 or PS3 is in the future, just not the near future.
Ease of use - While nothing is "dummy proof" - as evidenced by my inability to the get the OTA feed to put surround sound to my receiver - this is pretty easy to get around in. Hookups are clearly labeled and easy to access. The manual is a straightforwad if a bit sparse. An index would be extremely helpful, not to mention a glossary. The remote is laid out well and I've memorized it already without really trying. The TV menu is easy to get around in as well once you recognize the icons. Thanks to Sourcery and the tweaks thread for my base settings - it's made it a lot easier to get up and running since this baby came out of the box lit up like a Christmas tree.
Discoloration - none that I know of, but I'm not looking for it either. Same with convergence. It appears to fine. Every time I think I see something out of line on the side of 4:3 picture, it's gone on a different channel, so I'm thinking it's a bit more of me looking to find something rather than something actually being there.
So, all in all, thanks to this forum for being so thorough in regards to critiquing this TV. The input here was more than helpful - damn close to essential - in knowing I was picking a TV I wanted and by making sure I had the right questions for salespeople (we don't even want to talk about the bodycount of discarded salespeople who couldn't answer my questions or, if they did, acted like I didn't know what I was asking). FWIW, I purchased my from my local UE in the Minneapolis area and had a pleasant experience. I'm still watching the sales ads for the price match at local b&ms, though.