I just wanted to throw my two cents worth on a couple of points raised above. First, I switched from the ST50 to the ST60 because the ST50 begans turning itself off every 10 minutes after I had it for about 4 weeks. I had no complaints with the picture, although it took a lot of tweaking to get it to where I liked it. My main complaint against it was the TV speakers. It had the worst TV-alone sound of any flat screen I have owned. It was almost unlistenable wthout using my home theatre speaker set up. But I was quite happy and impressed with the picture of the TV before it failed.
After almost 4 days of viewing the ST60 I am now fully convinced it is sharper and clearer (smoother) than the ST50, especially with a 1080i cable box signal. I don't know if I would call the ST50 soft but the new model is noticeably sharper, and that is with going from a 50 inch screen for the ST50 to a 55 inch screen for the ST60. And as I have said before here, the default settings for most of picture modes are the most natural and watchable of any default settings I have seen. In addition, the new model comes with two sets of 3D glasses, something the ST50's lacked. I would also say that the blacks are possibly a little better than the ST50. And the TV speaker sound is way better than the ST50 such that I have watched a few hockey and basketball games without using the home theater set up. And I can detect no buzzing or brightness pops or fluctuations when watching hockey or other scenes with a lot of bright white in them.
As far as I can tell the only negative change is the fact that the stand no longer swivels. I cannot comment on screen reflections because I have it in a dark basement setting. I have noticed no IR to this point.