Hello....been kicking over the idea of purchasing a refurb 2.6 8-core. However, after reading a couple of post on the problems with upgrading the graphics card, it seems I should just wait until the 2.8 8-cores make it into the refurb store?? My main reason for getting a macpro with 8 cores is simply that I want it to be useful for 5 years at least. I like the idea of being able to upgrade it as technology keeps moving forward. Price should be something like $2200 don't you think? Any thoughts?? TIA..