I'm not too sure about that. I originally had a 650, but it had some dead or stuck pixels, so I exchanged it for another 650. To me, the second 650 that I had did not seem to have as good of a picture as the first 650. Same environment, same set up, same blurays, but the picture just wasn't as tight as the first one I had., and I really don't think the first one I had was incredible, I mean it was a good picture, but I wasn't blown away by it. Anyway, I then exchanged the 2nd 650 for a 750, and found the 750 to have a phenomenal picture. It handled digital sd signals extremely well, and the high def channels and blurays were spectacular. At this time, I had the 750 sitting on top of an older Mistsubishi projection tv, and because of the height, I could see the halo effect on every edge of the bezel. I eventually exchanged it for my 3rd 650, and once again found myself disappointed in the difference of picture quality. I know the specs are the same, but somehow, the picture quality of the 650 is not as good as the 750. The other issue I had was that the 650 - all three of them - did not handle motion as well as the 750. It didn't matter if it was set to high, medium or low, or even off. It was pretty jerky on slow pans and, compared to the 750, this is another area where I found it to be substandard. The first 650 had version 1003 (?) and the last two had the 2001 versions of firmware. Anyway, 3 650's, every setting / adjustment possible, and it still, to me anyway, came up short or the 750's pq.
Now, after hauling 4 52"ers back to BB to exchange them, which pretty much sucked each time, I think Samsung has finally got it right. The 850 is the 750 on steriods, and then slimmed down. The pq is amazing, just like the 750. The appearance of the set is ultra cool and very sleek. The toc is darker than the 650 and the 750, and is very subtle. It does have a swivel stand. The remote is more responsive, and the wheel does not have a mind of it's own. The toc on the on screen menu is kinda cool too. The auto motion plus seems more refined to me. I will occasionally see minimal blurring, but it seems to be very smooth. No more blurring on slow pans, which varied in intensity on the 650, but moreso on close ups with slow panning. The black levels are excellent, which I was concerned about with the tv being so slim. The squareness of the tv looks much better than the underbelly of the 650, although that tv is still very cool looking ~ just not as cool as the 750 or 8 series.
Anyway, I've had this tv for 2 weeks now, and have absolutely nothing bad to say about it at all ~ well, except that it is a little dust magnet ~ just like the 6 and 7 series.
It sounds like I may have paid a little more than some others will get it for ($3100), but, with my track record, I feel much more comfortable dealing with a store that will make sure I'm happy with my purchase, even if I am at 45 days like I was with my last 650. To me it was worth it though. I got my 650 for 2349 - big difference there, and my 750 for 2579 ~ but to finally have a tv that I am very happy with, is worth it.
Hopefully, here are some pictures of the 850.