I was at Sams (walmart's price club) the other day and they had a big-ass passive 3D visio on display with some glasses tethered to it. I tried it out, boy did I find it unsatisfactory. The horizontal scan lines are CLEARLY visible. If I had to choose between HD (without 3D) and passive, I'd chose the HD. I didn't stand there long enough to really give the 3D a workout, but it seemed ok. That is, except for the fact you are getting about half the resolution of 3D. I know everyone has their own personal tastes, but it's hard to understand anyone being happy with passive 3D. I guess I see 3D as an enhancement to HD, not a replacement for HD. I need both.