I am about to buy a mac pro (2.66 GHz model) with a 23" Cinema display. I use Photoshop frequently and will buy the new universal version whenever it is introduced. The only other CPU intensive thing I do is edit and compress family videos using iMovie and QTPro. Questions: 1) Will the $315 upgrade (edu price) to a x1900xt affect performance on those things? 2) Would it be easy to add another hard drive later if I start with a modest HD? 3) Is this model likely to support all the core feature in Leopard? 4) Would it be easy to add a second Super Drive later if I start with just one? 5) Anything else I should know or consider before I pull the trigger? Here is my cart: Thanks for any advice.