Just a quick note to say how pleased I am with Server 2008 on this Mac Pro. If you're considering adding another OS to your mix, and you don't mind a bit of configuring, you might give this one a look. If you're not familiar with it, I would characterize it as a stripped down, locked down, lean and mean version of Vista. An example of what I mean by lean: there is no audio in the default configuration I have pretty much everything working (64 bit version, btw). The Boot Camp drivers are sufficient for most of it. I got the latest ATI Catalyst drivers off the net, and the last remaining issue, missing bluetooth connectivity, was solved thanks to this page: http://www.gilkirkpatrick.com/Blog/...t-Bluetooth-Stack-on-Windows-Server-2008.aspx Here's a guide to setting up Server 2008 as a workstation OS: http://blogs.msdn.com/vijaysk/archi...indows-server-2008-as-a-super-desktop-os.aspx Finally, I would recommend downloading the trial version before doing anything drastic involving money. This OS is most definitely not suited to everyone, and not all software that runs on Vista can be installed on Server 2008. You have been warned!