To all you photoshop users in the forums I've got a few questions. What laptop size do you use for photoshop? Is 15" a good size laptop for photoshop? Is it better do download Photoshop or buy the instillation disk? Is Photoshop worth the 700 or so $s if I am an avid photographer who works with Nikon DSLRs and takes graphic design classes for school? Thanks.