I have a Mac Pro from 2006 (ordered as soon as possible after WWDC 2006...) that has slowly faded out of my life. As such, I never really bothered to upgrade any of the original components except the HDD (I added a 1TB drive). I've decided to pull the aluminum dinosaur out of 2006 and into 2012 (if I don't sell it first), but aside from adding RAM, what graphics card would I be able to put in it? Would it be powerful enough to run some modern games off of Steam? Also, it's still running 10.5 but I would upgrade to 10.7 if I decide to keep it. I'm a university student, and don't really run any CPU/GPU intensive programs anymore due to schoolwork. However, I would love to be able to sync my notes and outlines from my notebook (a rev A MBA) to my desktop for working when I get home. I don't know if Pages supports iCloud integration in 10.7, which as I understand is the last OS update the 1,1 Mac Pro will get. Is there anything similar that I could achieve? Thanks!