Cheapest I've seen it so far. I purchased this from jl in November and got them to price match at £619. Since then it's gone up to £800 and is now back down to £650 at most retailers.
Better price here plus the 5 year warranty. And if it drops again in the next 28 days you can get jl to refund the difference.
It's a good tv btw. Has some issues with local dimming but otherwise great.