I'm eyeing up an early 2008 2.4GHz Core 2 Duo MBP with the 512mb 8600m GT that is working perfectly AT THE MOMENT. I know that the 8xxx series is a very unreliable line of cards & I've heard that 07/08 MBP's are too. Does anyone out there still use one? What can I do to prevent the GPU from failing? How likely is it to fail on me? Thanks.