As some of you may know from my previous comment in another thread, I've decided the nMP isn't the ideal fit for my workflow (at least not without incurring a large expense in Thunderbolt accessories that I don't really need). My aging 3,1 is still plugging along fine, but I'd like to step up to a faster/more powerful setup. My problem is that I can't decide if it's better to go with newer hardware (2012 5,1) or if the older versions that have been upgraded (2009 4,1 upgraded to 5,1 - and 2010 5,1) will still last the 5-6 years I want to use them. Whatever model I go with will be upgraded to 12-core X5690's or X5680's, so all things considered the question I have is with the supporting hardware, not the cpus per se. Obviously, the fact my 2008 3,1 is still working fine tells me that the cMP was built to last, so that inclines me towards the older models and a smaller initial cost. On the other hand, I still have doubts about "upgrading" to hardware that is almost as old as my current setup and expecting it to last another 5-6 years. This makes me think the newest hardware will have the longer lifespan for my use. Am I over-thinking this? Anyone have insights on this that can offer an opinion as to which way of thinking is more in line with reality?