I had a 47 inch set at 3 metres and found it too small for movies particularly when they were shown in cinema format with black top and bottom. I now have the new Samsung UE55C8000 and find it very satisfactory in most ways. A year ago I bought a Samsung 7000 set (can't remember the model number ) and sent it back after a day due to bad clouding, poor blacks and severe off centre axis brightness variations. I was a bit wary of buying this new set but did a lot more research to narrow down the choice between this set and a similar LG.Got it delivered and it was spot on more or less out of the box. It has stunning black levels with no clouding at all, is very sharp and after I switched off all of the processing I am very happy with the picture quality. After 3 years watching a set ( Tevion) which I thought was sharp but had poor black levels this new set is just stunning and is less high but just slightly wider overall so I can see more of the view behind the set and the mrs is happy. It doesn't face a bright window so does not suffer from reflections even though the screen has a shiny finish. The shop demo wasn't so good as it faced a bright window and it did have reflections.
Now the 3D side! Well I bought the set for its picture quality and when you pay this much now you get 3D as part of the package nowadays so I thought I may as well bite the bullet and accept it. I have watched both live and movies with 3D and have to say I am not totally convinced yet. Whether it's the learning curve both of my brain and/or the ways movies are shot, I am finding it quite hard to watch a long movie ,but will make an effort soon and also buy a 3D game to try on my PS3 to see if that is different. The impression I get is that my eyes are struggling to cope with all the different changes in the plane of focus which is determined by the way the 3D is constructed in production. I also find that even though it is 3D it seems to be like a number of cards stacked one in front of another ( the only way I can explain it!) and not a smooth transition between them. I think you can only judge it yourself as I think 3D viewing is a lot more personal which is why some like it and some hate it.
OK so the jury is out on the 3D side but I can thoroughly recommend this tv for 2D even though it is a bit over your budget, but I bet prices come down even more as the next gen models start appearing at the shows....doh!!!