I want to buy an iMac to have an 'office' plus use my MBP when out and about. As an example, I want to sit in my home office and prepare a meeting. Go to the meeting, pull out my MBP and update the documents with notes then, once home again, amend the document on my iMac. As it is, I'd need to keep emailing it to myself. But is there an easier way to just select my Documents folder on each Mac and have something just keep them in sync (without needed a separate 'sync' folder)?