What's your budget xxx?
For what it's worth, i don't recommend the Samsung as it doesn't even have a backlight adjustment option which as you'll see, is VERY important when you watch movies in your dark living room at night... Plus, the processing is very poor and still loses edtail at both ends of high contrast (whites and blacks just don't have much detail). trust me, i've had the R51 and i have an R72 now at home (my flatmate's).
If you can stretch it, the Sony V2000 is the best out now, the easiest way to describe it is that out of all LCDs, it's the one that gives an image that's closest to CRT wrt colour, contrast and black levels. It might use the same panel as the Samsung, but everything else from backlight to processing to adjustable properties is wonderfully better. The blacks get so black that they're darker than the frame, while the Samsung is still victim of the "dark grey" effect LCDs have. Plus, the sony still retains loads of detail in those dark areas!
Panasonic are good too.