Just my 2p worth.
I have the 40w2000, and think it's a teriffic TV, the only thing I wish it had was 1080p24, though to be honest, I've watched about 20 bluray movies on there so far, and not had a problem with distracting jerkyness.
My set had clouding when I bought it.
It was quite noticable when you had a very very dark scene, or just had black screen.
Within about a month it faded.
I went away during the summer for a month, and when I came back, I noticed clouding again. Within a short amount of time (I forget exactly, as it really wasn't bad, again, unless you just had a black screen) it's now fine again. Every day usage seems to clear the clouding anyway.
I'm more than happy with mine, and never thought it's justified taking it back... though the amount the price has dropped since I bought it 6 months ago is shocking... still, isn't that always the way with tech
V1N.
EDIT: and in answer to the OP, it's a brilliant TV for a PS3, as that's what I use on mine. Just take your time to calibrate it when you first get it... though I guess this is true of any TV. Those standard brightness levels etc are horrific, and 1:1 pixel mapping wasn't selected by default for the HDMI ports.