LOL - these posts against plasma are pretty funny.
I have a 42" 16:9 Panasonic ED plasma in the bedroom, a 17" 16:9 Dell LCD in the kitchen, and a 133" 16:9 screen projected by an Infocus DLP in my theater room.
Each has it's uses, it's strengths, it's weaknesses. If flat on the wall is what you're looking for, you can't beat a plasma for it's excellent viewing angle, great shadow detail, and relatively good pricing. LCD is getting there, but I fear the shadow detail will never be comparable to plasma (and that's a big deal to me). LCD pricing is also very high still (for a large screen). DLP just isn't slim enough yet.
Front projection is the way to go if you want to control the lighting, and I love DLP over LCD.
Regarding the original post, that does seem like an excellent price (though to be honest I haven't kept up on 50" plasma pricing). The brand, however, would scare me. I'd rather spend a few extra hundred on a solid brand (like Panasonic or Pioneer) than have headaches down the road. If you can save significant cash, it might be worth the gamble.