I'm about about this --><-- much from buying a mac pro and it would be so reassuring to know that when I outgrow the machine in 3-4 years I can give it a new life by putting in a faster processor. CNET in their article in which they talk about replacing the quad xeon with the "pin-to-pin compatible" octo xeon made it sound like this is not something people should be trying at home. I thought it was supposed to be as simple as pulling the old one out and sticking the new one in. What's the truth here? Is the CPU really buried in there under a dozen other components?