I know the difference between the two but what do you think? air vs book pro Getting the new MBP 512GB drive 13" for 1700 vs. updated MBA 512GB drive for 1300? I need the HD size and upgrading from a 2012 unibody MBP. Honestly I don't do much on it besides use safari, photos, and photoshop once in a while to make things nice but no video or intense gaming really. Think the MBA will get super obsolete earlier than the MBP? Are the speed / differences / screen that noticeable? Thanks in advance!