They problem with Samsungs is they seem to be rubbish at any form of picture processing – so you will need to ensure that you are only feeding it high quality HD and that you have turned off any of its processing functions.
They had a big Samsung in a 5 star hotel I just stayed in and there was a mix of SD and medium quality SD and the picture just didn’t seem acceptable.
I have also seen several people comment that they cant display skin tones very well – that is how it always seems to me but I would hope that they could be calibrated back to normality.
And I am also not sure Samsungs reliability is that great.
I would look at a Panasonic or a Sony – I thought the recent Sonys seem to have good picture quality.