Eh, Ted, I hate to do this to you...:-) Normally I would not advise on waiting for new technology, but you've lived with your tube happily until now, and may be able to live with it for a few months more, so I'll chime in:
The flat panel world is about to change. 1080p SEDs are about to be introduced by Toshiba, in Q2. Others are about to follow shortly. The prices are supposed to be at Plasma/LCD levels.
If you can wait a few months, it might be a wise decision (I was about to make the jump to a 65" plasma, but decided to wait until the end of the year, since I can live with my current set up, and think that the change within the next few months will be significant.)
I have LCDs, and personally would not use one for more than casual movie watching. They are great for computer work, but for movie viewing, I'd much rather have a lower resolution plasma, than a 1080p LCD: the difference is kind of like comparing offset printing to digital printing (there is just something off about the latter.)
SED promises to address some of the glaring shortcomings of LCD, while keeping the price down and giving it some of the 3D feel of plasma. The early reports are positive.
If you can wait a few months, it may be you best bet.