Plasma is garbage. Easiest way to look at it, SONY, the leading brand in televisions, doesn't even make Plasma any more, just strictly LCD televisions. Plasma's have a glare, give off heat and they cost more to have on the energy bill. They also show a ghosting image from a wide viewing angle, lots of people say they don't but you'll notice it. But it depends if it's for a basement Plasmas look really sharp cause there is no light to reflect off it, but honestly LCD is the way to go.

Now, between a Rear Projection and an LCD it all depends on what you want for size and if you want it being able to be mounted on the wall and all that. If you're taking viewing angle into consideration there really isn't a point to it. Honestly, who watches TV from a 180 degree angle? I mean LCD is cool because they have a 178 degree viewing angle from top to bottom and left to right. But a projection is a fine buy if you want a bigger screen.

Personally I'd go with the SONY XBR 3 40 Inch LCD if I was you, I dunno..