For one reason. Glossy Screen. After a day of using it I really cant handle how much it hurts my eyes and gives me a headache. The brightness dosen't help either, yes I have tried the F keys and calibrate in the machine preferences. It's a shame because I love the machine, love it's performance, etc. But before I do, is there anyway way at all I can take it somewhere to have the glossy screen replaced with a matte?