Base model is fine for you. High-end 13" has nothing different from low-end (only 270MHz faster CPU which is unnoticeable). Buy RAM from http://crucial.com
And remember if you don't want the free iPod or free Printer you should get them and do the rebates anyway so you can sell them to save money. Textbooks are expensive!!! Here's how to save $250 that could buy half your books!!!
Edu Discount 13" MBP = 1099
Cost of MBP 13" plus iPod Touch 8GB with Back to School = $1099
Cost of MBP 13" + iPod Touch 8GB + Free Printer with Back to School and free printer deal = $1099
Sell iPod Touch for $200 = (-$200)
Sell Printer for $50 = (-$50)
New Cost of 13" MBP = 849.99
Savings of $250!!
Where do you get the printer I only see the iPod Touch?
If i was me, i would wait until it's closer to the school year, save up and get the 13" macbook pro. I know, he doesn't need it, but I sure like the looks a hell of a lot better!
(not to mention in Georgia, there is a back-to-school tax-free weekend around august that covers computers and such...so that would be another nice discount.)