I thought you guys might be amused to hear that, up until a few weeks ago, I was still using this TV in one room, with its uneven dirty yellow whites and slowly-fading third bulb. Alas, I think a cold solder joint is failing, because it tends abruptly to turn off after about 5-15 minutes of being on. The vents are all clear, so I have to think it's a bad trace/pad somewhere that loses contact after heat expansion. Perhaps in the power supply.
Anyway, that makes 7.5 years of mostly-on usage, which aside from the godawful optical block problems, were pretty good. At least I managed to satisfy my rule of thumb about averaging $1000 or less on a premium TV per year. Time, now, to retire it and enlist a newbie, preferably for less money this time. :P I just wish it were a year or two down the road so I could reasonably afford a 70-80" 4K TV, but I don't have the $15-30K it takes to get a decent one right now.