I've had the Sony KDF-60WF655 for a few months now and absolutely love it. I'm using it as an HDTV from my local Mediacom provider and also have a HTPC hooked up to it for web surfing and DVD upscaling.
My biggest problem with the TV so far is the Twinview feature. Everywhere I look, it says that you should be able to use ANY two inputs at the same time. For me, that's not the case.
Ok, I'll press the Twinview button and my second screen will pop-up. On the first screen I can use any of the video inputs, but on the second I can only flip between the VHF/UHF input, the Antenna Input, or the Video 1 input. After that, it just loops right back to VHF/UHF.
I'd like to be able to use my HTPC at the same time as watching my Digital Cable, not just Antenna TV.