Yeah the high end LCDs are so close to high end plasmas in terms of video processing and black levels that the difference would be pretty much unnoticeable without test equipment a highly controlled test setting.
My opinion is that most people posting here (sure there willl be exceptions) would be better off with LCDs because almost every gamer I know spends most of their time with some to a lot of ambient light in the room. A high end plasma (vt, zt, 8500) really only has a slight edge if the room's lighting is highly controlled. If it isn't then the high end LCDs (w900, f8500) just look better as they just can put out so much more light than a plasma. I have patio doors, many windows, room lighting and reflected light off hardwoods/granite. And, yes, that is pretty extreme. However, I have a "Daylight" setting I put on my 8500 and I can watch/play any material just fine because it is putting out so much light. My old plasma? Sure, black levels were great at night but I couldn't see nearly as much detail during the day (even bright stuff like sports was sort of washed out). At night I just flip the video mode to "Night viewing" and my black levels approach the best plasmas (and are superior to low end plasmas). Sort of win-win except for the cost.
The person who posted yesterday who has a dark bedroom with no lights and heavy shades...he/she should go plasma. Other people need to really examine their viewing habits and get what works best for the way they use the tv and not necessarily how some reviewer rates it in a highly controlled test environment.