Well there's a lot more than just size and weight..
there's distortion (rather lack thereof)... the picture on the LCD is crystal clear.. no blurriness, nice and bright.
Also there's the headache factor... my eyes are MUCH MUCH more comfortable and relaxed after looking at the LCD for hours, compared to just about any CRT I've used in the past, even though it's much brighter.
Mine has a 8ms response time... plenty fast enough.. only time i see any blur is when zoomed in all the way in a turret, and swinging it around full speed, and even that is barely noticeable. I'd imagine a 6ms or less would completely cure this problem.
I have one single dead pixel, about 2/3 down in the middle of the screen, and you really have to strain to notice it... it's maybe 1/10th the size of the smallest enemy dot off in the horizon, and not even completely black (it tends to blend in). They do have special movies you can position over the dead pixels and maybe bring them back to life, but i haven't tried it yet... it's that inconspicuous.
I'll just say this... I'll never go CRT again if I can avoid it. And mine was an el-cheapo... 19" 8ms 1280X1024.. paid $175 with shipping.
Good luck