Re: U50 versus UT50 - I don 't think the picture quality in 2D is very different. The reviews I have seen on the internet and in Consumers Reports lead me to think the 2D PQ is almost identical. I purchased the 55UT50 rather than a 60 inch set because I have the set on a rolling cart and can adjust my viewing distance. If it is wall mounted and viewed from a distance I would probably opt for the larger set. This assumes you don't need/want 3D and internet streaming . My unit has no buzzing that I can hear and I don't know what rising black level means. The black level on my set is excellent.
Thanks for your thoughts. I think I'll try and find the 60" if I can. I did hear reports of buzzing and floating blacks on the U series, but not enough to know if it's any more inherent to that series as I've seen buzzing mentioned on just about any plasma.
I checked yesterday at ours and it was going for $679.00. I am thinking about pulling the trigger shortly if the price keeps dropping. I would like a larger TV but at this price it will hold me over for a few years. What part of the country did you see if for $649.00 at Costco?