I have the original 1,1 Mac Pro with two dual core 2.66GHz CPUs and 6GB of RAM. Sadly Mountain Lion does is not supported and I have found a used 2008 with two quad-core 3.0GHz and 12GB RAM for sale for about $1600. My current Mac Pro 1,1 has a 240GB SSD and a 2TB WD Black along with the NVIDIA GTX580 that I can move to this new Mac if I buy. Question is, it it worth the upgrade? Will the two quad-core 3.0GHz with 12GB RAM be faster than the 2009 Nehalem based models?