I am deeply offended, that you too see the benefits of virtualisation
This (virtualisation) is the main game to my mind and sad to say that rise of Intel architecture chips makes this easier, as it avoids need for emulation.
I agree 100% that it really does not matter if you use Solaris, Linux, OS X or Windoze as the underlying OS once you decide to go down the virtualisation path.
I moved to Mac originally when then they where PowerPC and with the introduction of BSD based OX X... but now that they are Intel based it has really been a huge benefit to me in making my system setup/adminstration simpler.
What I like about Mac is that it makes it easy for me to setup VMs and the back these up via "Time Machine" without having to worry about tar, cpio and other backup programs. As simply put the most important thing is not the hardware but the data you have on it. With my SGI box, I had to manually manage keeping multiple copies of data files as I had stripped disks without mirroring (due to me not having an XVM mirror license). Now I have big data sets sitting on stripped/mirror disk set, with periodic back up to slower striped set via Time Machine. This works well as it provides good degree of redundancy with ease of use I was not able to achieve with either Windows or IRIX.
I have got rid of 4 PC and the Octane is currently makings its way out into ebay land...
For me a 8 cores of CPU provides me with more than enough grunt to do my work.
Also fortunately being back in Australia, the high cost of shipping of shipping Tezro is now much easier to resist
Irrespective of whether you are on Solaris or OS X I think that what we need is to get drivers that allow hardware OpenGL acceleration from VM. Currently VMWare has this of DirectX but not OpenGL...
BTW what virtualisation software are you running? Is in native SUN product, VMWare or something else?
Unfortunately from a licensing point of you you cannot officially run virtualised OS X Server on anything than a Mac...
I have not read the standard Mac OS license, but was going to see if I could virtualise this from VMWare, just to see what happens. I will report on this once done.
Cheers from Australia,