I havent noticed any rainbow effect on mine, even when playing my Xbox 360 in Hi-Definition, but I do occasionally see the dithering when you have fast moving skin colour..
ie if a camera pans quickly accross someones face, or someone runs accross the screen...
Its so momentary that it never becomes annoying, and the resolution and contrast 2000:1 more than makes up for it..
I have read some reports that the black levels arent as good as plasma, but this simply isnt true on mine, and other reviewers of my TV say the same...
Sadly Sagem have stopped making them as they had some reliability issues, and they were costing them too much to fix under warranty, although mine has been flawless.. so far.. its nearly 2 years old...
Sotos, if you are anywhere near Nicosia I am happy to show it to you some time..
Its all very well listening to a fanboy, but far better to judge for yourself