That's the kind of feedback I'm interested in.
When I researched my present TV over six years ago, burn-in from 4:3 material was a major concern (and they most certainly called it burn-in back then). There was a lot of talk about how the purpose of the gray bars was to prevent uneven burn-in (even burn-in good, uneven burn-in bad). The common wisdom was that, if your contrast wasn't set too high and you varied the material you were watching, this wouldn't really be a concern. However, after five+ years, it became apparent that I had 4:3 burn-in (technically the center of the screen was more burned in than the sides).
In my mind, if you have to watch most of your 4:3 material stretched, you're compromising your viewing habits to fit your TV. I would rather compromise my TV to fit my viewing habits. I refuse to stretch classic movies. I will stretch some 4:3 TV, but I prefer not to.
I doubt we would really watch 33% 4:3 material (probably more like 10-20%), but my point is I don't want to have to worry about it. I can hear my wife now: "We paid all this money for this fancy, dancy TV and now we have to worry about how we watch it?"!
I'll see what others have to say, but I suspect I'll be looking for an LCD. The problem is I'm not sure that LCDs are quite there yet. I may just wait another year and let them work out the motion issues (though it sounds like they're getting close).