I currently have the 8-core version of Apple's January 2008 Mac Pros and I am looking at the new Mac Pros released in July. And I was wondering... how would the quad-core Nehalem model compare to the eight-core Mac Pro that was released in January '08? I don't recall the processor names of that Mac Pro... but I was just wondering if it would be a worthwhile upgrade or if I'm actually better off with my old, eight-core, instead of the new, quad-core. Can someone offer any advice on this? Would the newer quad-cores be faster than the older eight-cores? Thanks.