Glossy displays are beautiful, but they aren't as accurate as matte displays.
It's kind of like with music, setting all the treble / bass controls to 'zero' gives you a flat, accurate sound, but it 'sounds better' (But less correct) to amp them up a little bit, which is what a glossy display is like.
I love the look of glossy displays, but I recommend matte to most people, especially anyone doing any actual video work. If you were running a recording studio with Logic Studio, I'd probably say go glossy
I personally like the glossy better. You should take a ride by the store and check the screens out yourself. If you do not have an store near you check by an apple reseller. This is really personal preference do not go by others opinions.