It may work out better to buy in the UK.
Not with the dollar so cheap. A low end 13" MBP w/ UK student discount is the equivalent of $1400, of course that includes Apple Care. There is an authorized Apple reseller in the U.S. that is selling the same MBP to anyone for $999 (£611) + tax to any customer who wants one.
But even Apple's U.S. Edu price is the equiv of £673 vs. the U.K. prices of £859. So it really comes down to whether you want to buy AppleCare. Apple isn't really giving it away, it's just hiding it in the package price.