Honestly. This might sound kinda weird.... But I think it might be smarter to go with Apple if your gunna buy extra RAM, even though there is a price difference. Heres what im thinking. The mac pro is being advertised as the most upgradeable and powerful mac ever. And this is quite evident, since there have never been this many options when it comes to your Mac. Thing is tho, Compare the later model G5 cooling to the cooling on the Mac Pro. The Mac Pro is like downright passive. Quite a bit like the G5s of yesterday, they will be getting progressively more and more cooled. Its a proven fact that the next generation of Intel server chips will produce alot more heat per chip. And im sure later on, all the other components will produce more and more heat (graphics cards especialy). Apple, being the smart people they are, have anticipated this far in advance, and I think, have designed the Mac Pros new case, to have a low heat baseline for the Rev A stuff. So that when the gen of chips come out, with all thouse extra cores, the Macs cooling will be easily upgraded to go along with that extra heat. After seeing several memory companies pull thier RAM a couple days after the Mac Pro came out, it made me think. What if alot of the RAM coming out for the Rev A macs will be cooled enough for thier normal use, but might not be sufficent when the next Rev of Intel chips come out? I think maybe Apple gave these other companies a heads up and told them that while the heat requirements for this Gen of RAM might be good enough for the original baseline rev A Mac Pro, it might not be good enough for when people start upgrading them to next generation of Intel Chips. Of course, if this RAM wasnt rated for next Rev, this might cause alot of problems for people who buy 3rd party RAM now, and are still under warrenty, but are not able to upgrade thier CPUs since first generation of this RAM cant disipate the heat fast enough. What do you all think? Maybe its worth investing a few extra (well, hundred extra) dollars into future-proofing your RAM. Thoughts?