Hello there! im about to get a i7/8g/256 (or ultimate) MBA - since im a student i wont do heavy stuff on it and i dont really play games nowdays. however in that budget i can get a retina 13'', or even wait till they get the haswell update. things that bother me: -problems with retina displays - are they still here ? i dont want to play the roulette and get 'shadowing' burns on the screen -they are still third generation, no haswell yet what would you guys suggest? thank you!