We have done the Win 8 thing.
At first I hated it, as it was nothing like windows of old. I preserved, and very quickly it won me over. It will quite happily look after all your stuff, puts things where it needs them, works well with all those internetty things and integrates well with all your accounts, and whatever have you.
You kind of have to go with the flow, but then there’s Win9 due out soon. Which, if Microsoft have behaved as normal, will work much like Win8, but be much much better. A bit like the Vista (bad), Win7 (good) debacle.
£400? so much to choose from, I’d get to one of the big retailers and have a bit of a hands on session, get the one you like the feel of.