I had a C7000 series plasma (2010) and had it replaced yesterday(defective) with a C8000 and boy am I sure a lot happier with Active Shutter than I used to be. The glasses are much lighter, sleeker and cheaper than last year. The basic Bluetooth battery powered glasses for $50 are way more comfortable and smaller than the $179 (back in May) rechargeable IR ones for the C7000. I am not sold on the $80 rechargeable headband type...they are flimsy and awkward, but we'll see. The 3D worked okay on the C7000 but there was some crosstalk and some content was hard to watch...particularly "Wild Ocean" (the beginning Nokia animated short and the motion of the people and birds during the film) and Gears of War 3 (the subtitles really seemed to screw up the 3D image). I tested these out on the C8000 as well as a few parts of "Grand Canyon Adventure" where I noticed ghosting on the 7000 and there was a large improvement.
Another person in my family has an 55" LG passive and it seemed fine (watched part of Tron). I like the glasses, however I still think Plasma has the best picture (and obviously better for motion without having to use frame interpolation). The "half-resolution" argument seems to be mute. I haven't read one review where someone talks about a noticeable difference. I would be more concerned about the viewing angle which is worse with Passive. Active Shutter is 1080p to each eye, whereas Passive is 540p to each eye but still a 1080p picture overall once your brain puts the two images together. I don't think you can say your getting 2x the resolution of 1080p with active shutter though so something isn't logical there.
Samsung PN51D8000 3DTV,Sony BDP-S470 BD,Yamaha HTR-5063 7.1 w/Energy & Precision Acoustics Speakers