Guys, it makes no sense to buy a Mac and then chuck windows on it if he's going to be spending all of his time in windows. All he's got then is the aesthetics benefit, and the additional cost.
We have a bring your own device policy at work, everyone with a MacBook massively struggles because nothing works properly. My MacBook sits at home now and I use a Surface Pro here. Love it.
£1k is a decent amount, I can highly recommend the Surface, especially if you need to lug it from home...