Brother I am using Sony w650a full hd led for the last 1 year I have no problems and before buying Sony I am using Samsung full hd led.Following are the advantages I am seeing in Sony.
1.SD picture quality is better than Samsung
2.Awesome sound quality compare to Samsung.It has also some good bass also.When activate dolby digital plus through hdmi from adtv the sound quality awesome.
Brother I am also talk with two dealers one dealer is my friend.
First dealer is said that Samsung is better but my friend dealer said that Sony is better in picture quality and the quality of the equipments inside in it.But most of the dealers try to promote Samsung I think Samsung has better profitable for dealers than Sony because in Samsung bargaining is possible but in Sony it less possible and most of the Sony products have fixed price.