Looking to go back to Mac, and look at the Refurb store they seem to have some good deals, but a bit out of touch with the hardware aspects, or, if they are, actually good value for money, but a couple of the offers seem pretty good. here..
http://store.apple.com/uk/product/FC511B/A
http://store.apple.com/uk/product/FB953B/A
http://store.apple.com/uk/product/FC511B/A
http://store.apple.com/uk/product/FB953B/A