If you are doing creative work on it, then the "enhanced screen" isn't really a good thing, because then whenever someone views it on a not "enhanced screen" everything is a little duller. Doesn't give you a true idea of what you are doing. I hate it, because I do print design, and colors are off enough on normal screens as it is.
The anti-glare really won't be a noticeable difference from what I have seen. Your best bet is to go to an apple store and check it out.