I went for the NX200. It looks much nicer and I just didn't want yet another separate box/remote in case digital really takes off. Question is are you prepared to pay the extra. The Sony shops are selling the 36" for £2800. The "normal" retail price for the FS76 is £2000.
I don't think there are any other extra features to make the picture look better. They all seem to share the same DRC-MF technology.