Hi There This is my first post. I am a photographer and about to upgrade my 2008 MBP for the new 15" model. I am understand that aperture uses the graphics quite a bit but would like some advice as to if it is going to make a big difference if i upgrade from the base level MBP to the higher spec? I only use the MBP for email,web,a little photoshop and a lot of time in Aperture, working with large batches of high res images from amy Canon 5D2. Many Thanks.