Hi Markdc it sounds like you have done most of the work by reading reviews etc, the thing is if you are happy with what you see PQ wise then you are nearly there, it could be that the sales guy genuinly felt the samsung was the better option,if you went to a dealer and they tried to sway into buying a different TV would this be frowned upon probably not. try to see these models else where if this is not possible go back to RS and take some DVDS with you and ask to play these [ not animation] as these tend to look excellent on most TVs, something you are familiar with, then if you are happy go for it RS may even do a deal for you 5 yrs free cover for example, i have to say the samsung does look lovely is the model the rose colour version?? hopefully you can get a bit more advice on this forum as to what would be the best way forward, i know what its like though you get your heart set, then come away left dissapointed, keep an open mind look at the options given to you, but go by what you see and if you are happy go for it, i know RS have had there share of problems with selling products it was covered on this very forum, and there director came on and responded to customers concerns, but on the whole i think you will find most have good things to say about RS,hope this helps a little.
Andy