Ideally I should get a desktop probably an iMac every 3 years or a Mac Pro every 5-6 years plus a notebook (13" MBP or 13" Air) but how do I keep the 2 machines coordinated? I am sure there's software but new to Apple so don't know the name of it or whether it's easy to use. My other option is to get the 17" MBP. A little too big to carry around and the screen too small for desktop use. Well not small but not luxurious and comfortable like a 24"