Hi guys Yesterday I placed an order for an 21.5" iMac w. the 3.1GHZ CPU option and 16GB of RAM. However I did not choose to upgrade the internal hard drive to Fusion as my budget was maxed out. The main reason I didn't go for the fusion drive instead of the CPU upgrade, was due to the fact that I store all my iMovie video files and iPhotos on an external USB3 drive, so I assumed the 5400 RPM drive wouldn't hurt performance that much. Now I'm having some doubts over that decision. What do you guys think? Is the CPU upgrade pointless as long as the internal drive is a slow 5400rpm drive? Would you cancel the order and choose the fusion drive instead of the CPU upgrade, or keep the current configuration and store write-intense files on an external drive? I hope you can offer some advise here. Thanks!