Switching over to Macintosh

I've decided to buy my sister an Apple laptop. I know that there are various discounts you can get for a thinkpad... I bought my own with a significant employee discount. I also know when buying a laptop it is good to buy it with low ram and get extra ram from a reputable dealer later and install it yourself. Anyone have advice and tricks on how to get a good deal with an Apple laptop?

What's a good apple laptop for a student who needs photoshop occasionally, e-mail, printing, scanning, watching dvds, and little else? She's a weak girl so she also wants it to be light.

Thanks 4chan!

Oh-- there's one thing I really didn't like about buying a Mac (14" G4 iBook) recently... It gave me the worst carpal after only a few hours use, such that I now have a permanently numb area on my left hand. Crap.