I much prefer the matte screens. I have a several Apple displays and laptops, but the one glossy that I have (MacBook, not MacBook Pro) is a real pain for photo viewing and editing IMO. I've compared all the screens at the Apple stores and if you can do the same it would likely help you. That said, if you do go to make the comparison I would recommend that you log on to a site to view your own photos if possible.
I have one photo on my site that prints beautifully, show beautifully on my matte screens (all Apple) and is a total blown-out, overly contrasty mess on the glossy screen MacBook. And I tend to be VERY conservative in my processing, not liking "pumped up" photos. Luckily I use the MacBook as my traveling internet appliance mostly, as well as a place to view photos shot while in Asia, etc., but I can't reliably edit photos on it. It's just too contrasty IMO.
I don't find it badly affected by glare or reflection. I just don't care for the hyper-contrast and saturation.
Obviously, everyone prefers different equipment and workflows, so please don't take this an emphatic statement. I'd just caution the OP to study the screens in person if you can. I'll try never to buy another glossy screen, even to the point of buying another MacBook Pro where the lesser sibling would be fine for my traveling tool, just to avoid the screen.
Good luck with your decision.