I started with a 40" Visio which I bought reconditioned and it had Passive 3D, so I used it once in awhile. I bought this TV to use mainly for when I don't watch movies, I usually watch my movies on a Sony G70 (110" screen). I saw a good deal on a reconditioned 47" Visio with 3D so I upgraded to that, and I put the 40" in my bedroom. I like watching the 3D on the 47" a bit better, so I think a larger size does matter. I may eventually get a 3D setup for my Sony G70, but I see they only use Active glasses and I worry with my eyes, that I might get headaches or some other side effects. I am a possible candidate for cataracts or glaucoma, I am 70 years old with a bit higher than normal pressure on my eyes. I do like 3D, but I don't find many great new movies for it so far. Prometheus was one of the better ones.
JCP.. Optoma HD142x, 120" DaLite, Pioneer Elite SC-LX501, Klipsch Heresy fronts and backs, Infinity center, Klipsch KG-2 sides, Velodyne HGS 18" sub, Paradigm PW2200 sub, Advent AV550S sub, Energy 15" sub. Panasonic BDT-310 & Sony BDP-S790 Blu-Rays.