I currently have a small and slow (Windows based) netbook. But I'm now getting images, big files, that I want to process with some more serious software, at a decent speed and with with a decent screen. Is there anything against the Macbook Pro (I'll be aiming for a second hand/clearance, so it will be intelC2D rather than i5/7) ? Do I need 15 or 17 in screen ? Will the "old" specs be up to scratch to give speedy lightroom/photoshop operation ? I know there's lots of users and fans on here so would be interested in the cons as well as the pros - and if any nonmac users would share their specs for a laptop would appreciate that too.