I recently got a research grant of $40k to buy a personal (super)computer, and am anxious about the possibility of a Mac-Pro update. I would prefer a mac, but right now there are no options for memory upgrades above 64GB, or processor upgrades beyond 12 cores. I know that the mac pro will likely be upgraded or killed in the relatively near future. Assuming that it is upgraded, does anyone know how likely it would be for an upgraded mac pro to be expandable to >=128GB memory? are there any hardware-fixes to expand the current generation mac pros beyond 64GB of memory? also, does anyone know if mac pros (current or possible upgrades thereof) are compatible with NVIDIA's Tesla GPUs? and finally, I'd appreciate any advice regarding how long I should wait for an upgrade before investing. Thanks!