I just bought a 60NX810 a few months ago and my uncle has a 46NX810. IMHO, the Sony has more natural color and the Samsung looks a bit cartoonish. But the screen of the Sony is a lot darker and may not work well in a bright room.
Bravia KDL46-NX810 vs Samsung UN46C8000XF
Not that the ole CRT has kicked the bucket, but I'm seriously looking at HD TVs. While I'm convinced that plasma offers superior PQ, I don't think it will work in our home environment: lots of windows. Set will be used for an even mix of movies, daily tv (news, wife's fave shows, sports for me), gaming, and internet content. PQ would be my overriding factor. Any help would be appreciated from this HDTV newbie.