I have a 4051 that I use for gaming, and it's excellent IMO. I don't even use the Game Mode (I don't like the way it looks). Be sure to set your console to output 720p if possible. This is the closest to the set's native resolution, and will help to keep down lag.
I just purchased this exact tv for my xbox 360, Personally I think it is the greatest thing since sliced bread, but I haven't used too many other LCDs or HDTVs for that matter. I think if you go with this tv you wont be disappointed.
EDIT: I have no ghosting or motion blur issues either.