My late 2009 iMac hard disk died, I have a time machine backup on an external hd, iTunes on an external hd, Aperture library backup on an external drive. My new iMac will have 3 tb drive so I can now put iTunes on the internal drive. What is the best and easiest way to setup the new iMac ? Should I restore from the time machine backup during initial setup or use migration assistant after initial setup ? Some other method ? Please help .