I have used both, and it's really a matter of personal preference.
Glossy screens attract fingerprints and they also reflect light - in this aspect, they're sort of hard to position sometimes. Other than that, they have fabulous contrast and brightness. This is my prefered screen type.
Matte screens are a little less vibrant (in my opinion) and are more ordinary. Thats basically the downside to them - the contrast is a little lower. They might be preferable to you.
I really think the best thing to do is go down the a local Apple store and see the difference. Play around with either one for a while and get a feel for the picture quality and what not. I don't think you can go wrong either way
