Its almost as important as the best price to be sure that whoever you buy from will give good backup if the set turns out to be a dud. I think this tv is great despite its built in "features", but I still had to go through 3 to get a good one.
Pay slightly more and you should get free delivery and setting up(It needs 2 people to lift it and you need an independant delivery and inspection as a number get damaged in transit and it would be difficult to prove you didn't drop it trying to get it up onto its stand), and you should look for a free 5 year warranty to save hassle relying on the sale of goods act in lieu. Never pay for an extended warranty, you already have equivalent rights, just avoids having to take them to court to get the set repaired free.