I'm looking to get the iMac retina 27 inch. I don't know which hard drive to get. Should I get 1TB Fusion, 2TB Fusion, 3TBFusion or 256GB of flash? I want a FAST computer, I don't want to have to wait when using the web or editing photos in light room. I don't edit lots of photo's but when I do I don't want to wait. I use my computer for surfing the web, editing photos every now and then. I also use Microsoft word and excel allot. I have always purchased cheap $500-$600 computers and they all last a couple months then get slower and slower. What are your suggestions?