I just grabbed this tv today!(Was going for the Sharp lc42d64u, but it's sold out) (also considered the Toshiba 42rv530u, but the sales said the toshiba lcd is not as good compared to Samsung, LG, or Sharp)
So far I could say the I am really satisfied with the TV as this is my 1st HD tv, so I guess anything would look great to me.
Here is something I noticed, Standard Definition tv watching is not great, but still acceptable, but I don't really care, because I would be using dvi-hdmi to watch movies on computer. It supports 1080p and 1:1 dot to dot mapping, make sure you choose the "Just Scan" option on the menu though, otherwise it won't fit the screen properly at 1920x1080 resolution.
I didn't see any banding problem, however, I does notice 1 dead pixel at the very bottom right corner of the screen (but due to the location, it's hardly noticeable unless you look at it really close), so I am not gonna bother with it. So other than this, everything seems good. I will be doing more testing on 720p and 1080p source tomorrow