15 inch MBP right now, thinking of getting a MBA

I'm a college student and sometimes I just can't bare lugging around my 15" Macbook Pro (2.66/2010) around campus so I've been thinking about selling it and getting a Macbook Air 13" and a Cinema Display. I'm an engineering major so I will be using some graphics intensive programs. Will the Air do or should I stick to my guns for now. (Maybe wait for the rumored 15" air?)