just picked up a Sony W8 series 50″. Best picture I could find for the price but part of me wishes I had got the Samsung 55″ that was the same price. To be honest I would need a 65″ TV or a projector screen for films in the room we have now and everytime an action scene comes on or a rolling landscape in HD I remember why I bought the Sony.
Smart stuff is too slow but at least it now has a Plex app. Not a huge concern as our YouView box is much better as a TV guide and has all the on demand channels which no TV has.
I like Panasonic TVs though, good image but avoid the super cheap ones that are not real Panasonics. If you have a spare sat dish then they often have proper Freesat (Sony can receive it but you dont get a Freesat EPG and have to use the sluggish Gracenote one). 520 series upwards (520 is exclusive to Currys and is cheap for 50″) have Freetime so you can go back in your EPG and it will retrieve on demand shows like Youview does which is very handy. 650 model upwards looks very nice.
(PS I was upgrading from an old 32″ Philips CRT so was very critical and finding most LED TVs had a terrible SD picture compared to it)