Well, for anyone who cares: I've spent the past two weeks deliberating over a new TV to replace an eight-year-old Sharp 37" Aquos that's been reliable but seems to have experienced some darkening on the right side. Time to retire it to the nephew's room.
At first, I was firmly in the plasma camp, even considering the dubious option of buying a used Kuro off of Craig's List from someone out of state. Sensing that wouldn't end well, I then shifted my attention to the Samsung F8500, with the F8000 tugging on my pants due to a more attractive bezel. Also wasn't crazy about the plasma heat. I have a small living room, and it could potentially make a difference.
The reason I'm posting here is because I stumbled across the XBR55x900A and was very intrigued by the premise of 4K for an affordable price, even with content very limited at the moment. Also in its favor: very nice design, no need for a separate sound system (I'm not an audiophile), and the idea up-conversion could potentially make for a better picture across other sources.
So: ordered the 900A today and got what I believe to be a solid deal at $1895. I was flirting with the 850A but I think the speakers/aesthetics were worth the additional $300 (could've gotten the 850A for $1597). Also ordered the X10, which is due on 7/16. I know it's overpriced, but I'm not adverse to paying $8 for a 4K movie rental when Time-Warner charges $5 for HD.
After so many years with the same set, it just felt like I wasn't making a big enough leap by going to a high-end plasma. IMO, Netflix is going to make a big push for 4k in the coming year, re-scanning 35mm content. Honestly, if and when their four new Marvel series are available in 4k -- and there's no reason why not -- I think that'll be dam-breaker for the market, coupled with Vizio's P series making 4K displays affordable.
Hope I made the right choice! Will check in once I get my set to offer thoughts if anyone is interested. Quick question, though: I'd like to wall mount. Any recommendations?