I just picked up the Samsung PN60F5500 on saturday and got it wall mounted. I only have a few hours of view time on it so I can't provide much input yet, but major points that I have noticed are :
The screen is very reflective, even with the curtains closed (not black) I can still see myself in it. We have a window directly behind the couch/infront of TV so that seems to be the worst. I had a lamp on the other night off to the side and it didn't have much of an impact on the reflectivity, so it seems to be when a window or light source is parallel to the TV.
Screen is very thin, and the bezel around the tv is about an inch on the sides, and a couple inches on the bottom, so not as thin looking as LEDs.
I found the picture to be pretty great on Blu-Ray (running a Sony BDP-5100 3D blu ray) I watched Avatar 3D and Transformers (non-3D) on blu ray and the colours and blacks were impressive for me, coming from a 5 year old LG Plasma. I'm sure the high end TVs are better, but for the price I paid I wouldnt expect much more.Avatar in 3D was impressive and cool to watch in 3D
Regular HDTV (1080i) or 480p television is not too bad. I was watching hockey game last night and noticed some automatic dimming of the screen that seemed to be occuring over and over. I had all the eco settings and all that stuff turned off and didn't seem to help. Seems to be some kind of brightness pop based on what I've googled, hopefully it goes away and isnt a reoccuring problem, seems to only be noticeable on very white scenes like hockey ice, I'll keep looking for it the next time a game comes on.
I havnt been able to find some decent calibration settings other than last years Samung PNE550 by CNET, which I find very dull looking and not very vibrant on the movie mode and settings used. If anyone has any recommended settings I'd be willing to try them out, however still keeping settings low during a break in period. Maybe i'll start a thread to that effect.