Hey guys, thinking about getting an iMac and a macbook air to replace my macbook, or a macbook pro and 23" cinema display. I like the simplicity of having all my files on one machine, but it gets annoying having to unplug/replug all the time. To the people who have multiple computers, how do you go about maintaining them both in regards to syncing files, media files (where do you keep your itunes library), how is your home network setup, mail and other such issues regarding owning and using two machines. Do you like the dual computer option or would you prefer one machine? Any key advantages or disadvantages?