hello, i am looking to buy a macbook pro ( my 1st). i was leaning towards the 15 inch with the i7, but i wasnt approved for the credit card (-_-), so i have to sacrifice the nice i7 because my wallet isnt fat. i am a college student, i already own a 17+ inch lenovo, which is fine, but it sucks to carry around! i was thinking of getting the 13 in but then i noticed it doesnt have the intel HD graphics.... im not planning to run hard-core programs like adobe cs5 constantly, mostly play around with it, i really want to learn the mac OS (terminal-wise), i intentionally wanted the mac for ONLY school only but i am fascinated with power & speed. i would like my 1st mac to last me at least 5 years (more is better). any suggestions? thank you!