Mines a 320hp 3.0 6 turbo, with £220 road tax. I think that's pretty low considering!!
Rachel, I've got winters and despite what people say, they make the car perfectly usable in the snow. Everyone in Europe doesn't pack their BMW/Merc up for the winter, they just get the right tyres and get on with it.
Continentals always come highest in tests, by some margin. Have a look and see how those Khumos fare, but I'm sure they'll be fine.