I've heard of this green tint issue with the S1's before but personally either I don't see it, or it's not an issue. I've never heard of anything about black levels having issues either but then again I steer clear of AVS now because the guys there are just insane when it comes to this stuff. I was finding I wasn't enjoying movies or anything anymore because I was too worried about calibration setting and what not.
Mind you, it's not my main HT display so I don't care so much with it, either. It looks great and has been reliable and that's all I ask. When it comes to most electronics, for me it's Panasonic or Toshiba and I don't really deviate from that, unless you're talking something they don't build, such as (real) receivers. Mind you, I did buy an Epson projector rather than Panasonic, but that was solely based on Panasonics pricing in Canada on the projector line, which is a joke.