I'm a student and I use pro for reading papers and editting PPT for presentation. I don't play games for several years. But if the pro can run some 3D game such as wow , that's will be perfect. I want qual core i7 because several years later I want to upgrade it by SSD and 16 gigs RRAM. but is it a problem that the weight of 15 in pro to carry? Because I will take it to lab and library frequently. Considering the updating , I prefer 15 in;considering the weight, I prefer 13 in. Thank you for your minutes.