Bravia KDL46-NX810 vs Samsung UN46C8000XF

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.

I don't have the model you mentioned but do have the Sony Bravia KDL 46V5100. The deciding factor for me was when the salesman demoed them side by side. In that situation the Sony was clearly the better set. The colors are more natural and revealing. The Samsung has more of a blue tint which when viewed by itself gives the impression/illusion of a more dynamic picture.
I to have a large room with high ceilings, lots of windows and white walls, in that enviorment LCD or LED is the only way to go, Plasma will not work.
My two cents.

Unfortunately, I don't know a shop where I can demo them side by side in my area. In fact, my only option is the well worn big box electronics store (you know the one!). There, all brands looked far brighter than the Sony, and I'm leaning toward the Sony. Did you folks have your sets calibrated?