this is the mac pro i'm looking at. i can get it with 1 screen. any advice on the model? How long would it last. I do mathematical computer simulations for my physics degree and i do lots of photography and audio work. I'd look to put an SSD in there at some stage. Also thinking to upgrade the ram before it gets really expensive. I think i can upgrade to any graphics card that the new mac pros can use. So i guess the question is about the CPU and the RAM. how many years can i get out of this? i expect about 5. reasonable? and possible good CPU upgrades?