I have been deliberating for a while the best system to suit my needs and budget for producing instructional videos for my guitar students. I want to use FCP X, and would like to be quite creative with compositing, several camera angles, graphical fingerboard overlays etc. I would envisage each video to be about 30 minutes long. I don't want to create the next Avatar but do want to produce something more sophisticated than a simple holiday video. With my budget in mind and with the help of others on this Forum I have narrowed my search down to the 21.5 inch iMac with Fusion Drive. I have the funds to make only one further upgrade, either: - 16GB Ram upgrade (this cannot be done at a later date without computer surgery) - i7 Processor upgrade from the i5. Both options are the same price, and both options can only be done at the time of purchase (I don't fancy pulling the iMac apart). So what are your thoughts / experiences on this issue? Would the additional RAM trump processor prowess in my case or would the benefits of the i7's hyperthreading make it the preferred option? Many thanks.