Hi! i am planning to upgrade to a Mac Pro when Leopard is released and I am curious about how easy is it to upgrade the processor? I.e. I buy the standard configuration at the Apple store with a 2.66Ghz processor and at some point when I feel the need to speed things up a little- upgrade to a 4.5Ghz (when it comes) is it a complex task to accomplished? i am asking because I am debating about buying a standard config now or should I really splurge for the highest speed possible? i do a lot of creative work- video editing, motion graphics, Flash, website designs etc. and so I like something that will sustain me for at least 3 to 4 years. My trusty G5 2.0 has served me well since 2004 but now I am feeling a little slow when rendering videos compared to the Mac Pro I use in the office.