Hey guys. I bought the late 2009 Mac Pro as i really needed it to do my work at uni and be generally more productive as working on my old white polycarb macbook was just not cutting it. Anyrate, so i bought the low end quad core, 2.66Ghz. Heres my questions: 1) I am wondering if i wanted to upgrade the processor at a later date with a faster quad xeon, what frequency or model could i go up to before the FSB bottlenecked and made anything faster futile? 2) Also would i need to apply thermal paste, or is it just out it comes and in it goes? 3) And one more thing, would the new intel 6 cores being proposed possibly work? Thanks.