After I compared a 17" matte against a 17" glossy in store yesterday, I was even more certain I'd get glossy--and so I did when I came back home and ordered a 15" i7 Hi-res glossy.
The matte is very washed out in comparison. Doesn't have the incredible vibrancy, richness of color, constrast, or brightness of the glossy. The reflections that some people don't like in glossy didn't bother me. I had a 27" iMac and during the day, I'd turn up the brightness and reflections were not an issue. In fact, I barely noticed them.
As some people have noted, while the matte doesn't have reflections, it has a sheen in reaction to light. Like it's been buffed. And if you take a matte outdoors in direct sunlight, some people have said it becomes so washed out, you have real difficulty seeing the screen, whereas with a glossy, you just max out the brightness to counter the sun. I can say that comparison is true at least with a matte Fujitsu laptop I have vs the iMac.
If you don't have an Apple store near you, you could also just go to a generic electronics store and compare say a glossy HP Envy 13 to a Thinkpad.