if you can just up the budget a tad , maybe to £800 , your into sony 40ex503 / panasonic 42g20 territory , up it to £900 and your into samsung 40c750 3d territory .. all excellent ..
I have the same TV, but with some less specs(pk250). The picture quality is really stunning and the looks of the tv when its off too. I have some problems with it; line bleeding and a dirty screen effect. If this isnt normal for this tv then its an absolutely perfect tv for this price.