I have recently decided to invest in a decent system I will be using to edit fairly large (20-60mb) photo files in cs6. Having only ever used fairly low spec hardware with a single drive I went for the new imac with i7 3.4ghz processor, 8mb RAM (which I will immediately upgrade to 32mb myself to save money) and the 3tb fusion drive. What I want to know is how people think this mac will perform using an external laCie 120gb ssd as a scratch drive? As I said editing multiple, large files in cs6. Also any suggestions on an alternative external ssd for scratch?