I bought a plasma TV too, but its blacks are much worse than any of the CRT TVs and monitors I have. When a CRT is displaying black, it looks like the device is off, while I would never mistake my TV displaying black and being off (though it does turn off if you give it a full black picture, but place a tiny dot in it and the whole picture becomes gray). I read that there is a way to fix it by adjusting the power supply voltages, I have yet to try it though, the warranty has expired recently, so I will probably try this.
OTOH, this big 10cm TV is better than my previous 82cm HD ready CRT. Analog SD sources like Laserdisc or VHS also look good. Except for dark scenes in movies. Watching it in the dark makes the lack of proper black level very apparent. Watching it with lights on makes it annoying because the screen is so reflective.
In addition, it has quite high input lag if I enable any of the video features (or just set the video mode to anything except "game" and sometimes even "game" mode has lag), I solved this with an audio delay. Delaying audio for 240ms makes the image sync up.