varucell the E600i-b3 is a great tv, and you can get it most places for $850 and under. I love mine, and the M series doesn't really seem that much different then the E, other then lack of Banding and I see no DSE. Games, video of all kinds, and surfing the web all work great.
I just watched Tron Legacy again last night, and the blacks were great, and that's with Active LED Zones Off, I really didn't see much different between Off and On, other then the flaws when it's On. I think at least the B3 models have great blacks either way. Probably because they are Sharp Panels.
Gigabyte G1.Sniper 3, 950watts, Intel 3770k, 16gb ram, 30tb, Sli Nvidia 480, THX Sound Card, Logitech THX z906 Speakers, E600i-b3, Yamaha v375, Cerwin Vega VS150, VS120, L7's, and Klipsch 2.2