I am planning on buying a new iMAC 27" in the coming months. I have noticed that they offer the standard 1TB ATA Drive as well as a 1TB/2TB Fusion Drive. My goal is to move a fairly large music collection and house that on the computer as well as wife using for school, web surfing etc.. Which drive would be best for this ? Are the Fusion drives worth the expense? on that note, would it also be a consideration to upgrade it to the Flash storage and then use an external drive for the music? new to MAC and my wife and I are switching laptops and desktop out from PC to MAC. thanks for the input