Just to put my input into the discussion for those still trying to decide.
This was pretty much my deciding factor for getting a new 15". I went to the Apple store today and took a good look at both for about an hour. Spent time with both.
First thing that caught my eye was the antiglare. I couldn't put my finger on what exactly attracted me to it. After looking at both for a while, I think I figured it out. I like how the whole screen is undisturbed, and as a whole screen, it looked beautiful. I could see the subtleties of images, especially blacks. Yes I said blacks. I don't understand why people say the the colors are washed out. On the gloss, the high vibrancy of color washes out the intricacies of value change, especially blacks.
I was on a site (thecoolhunter.net awesome blog I frequent) and the blacks and grays all flooded into each other on the gloss, but on the AG I could see the gradations and nuances of the juxtaposed grays and blacks to create a beautiful web page layout. On gloss it was just all black...
The gloss reflection, I probably could've lived with, but with every little shift, from me or others, the screen changes, and I didn't like that. I want the screen to be represented undisturbed and true.
After reading through tons of these threads I just gotta say, IMO of course, I don't think the colors are washed out, and Hi res font wasn't too tiny for me. These were 2 things I was worried about.
So I then went home, and ordered me a 2.2GHz anti-glare 15". The end!