I plan to upgrade from a 24" iMac to a 27" iMac. If I use Time Machine to make a backup of my current 24" iMac to an external hard drive, can I then connect that external hard drive to the new 27" iMac and get all of my data back that way? Will all of my Applications, iTunes music files, documents, pictures, etc. work on the new 27" iMac just as they did on the 24" iMac? How would I go about doing this after I use Time Machine to make a backup of my current computer?