So I have a 2006 Mac Pro 1.1. It is very fast and does everything I need - my only concern obviously is the lack of support in Mountain Lion. My major issue is that even though ML is not major, future OS releases will be. So what Mac Pro models do you feel will be around for years to come? I would guess the 2008+ with the 64 bit kernel, at least the Mac Pro 3.1 correct? Anything that may make them obsolete in the near future compared to the 2012 models?