well, the best type of tv are CRTs since they give the best black level and contrast ratio.
plasma generally looks better than LCD, especially that it doesn\'t have motion blur and viewing angle problems. But now, that seem to not be the case for newer generation LCDs. So, yeah, stick with brand names if you want quality picture, especially if you are planning on getting LCD type display.
To put it short: if you planning on watching tv on a control room lighting, than get plasma because plasma generally have better black level and contrast ratio than LCD. If you are planning on watching tv on a bright sunny day where plenty of light can enter the screen, get LCD as LCD screen doesn\'t reflect light as much. Since viewing plasma on a bright environment reflect light and gives reflection on screen.
I hope that help.