Best Mac for photography...

[bevoholic]

I will be starting photography school this coming spring and I would like some recommendations on a Mac. I don't need portability, but I won't rule that out. I have my iPad if I need it as well for things away from home if I go the iMac route. Is there any difference between the iMacs in terms of color accuracy? If I go the MacBook route I don't want anything larger than the 15". Would you suggest the anti-glare screen? I know I will need as much memory as I can get as well, which is one of the things drawing me towards the MacBook.

Any help will be appreciated.