Netbook, MBA or MBP for Uni

Within the next couple of month, I'll be entering my undergraduate course (3 year course), where I plan to major in Architecture. At this moment in time, I don't think there will be a need anything powerful, but I'll be doing occasional graphics work, heavy note-taking/writing (my Uni is apparently heavily theory-based), the usual such as listening to music, watching videos, web-browsing. Also I want something portable and not over 13 inches.

From those of you who have experience with going to University or who are in a similar predicament which would you recommend? And does anyone know whether there will be discrete graphics card in the 11"/13" MBA or 13" MBP in the not so distant future?