I currently have my iPhone set up on iTunes on my iMac ("Xerxes"). Calendar and address book syncing are done over the air. But I'll be on holidays in Israel for two weeks and would therefore move the iPhone to my MacBook ("Blacky") and possibly deactivate over-the-air syncing. Then I'll be back home and will move my iPhone to my new mac pro ("Cyrus"). What's the best method to move the iPhone from Xerxes to Blacky to Cyrus?