Earthkiller Machine

I'm neither an Apple nor a Microsoft partisan. Nor do I advocate Intel over ATI. Heck, I don't get spittin' mad over Neve versus SSL. Wait, what blog am I writing?
Anyway, as I sit and wait on renders, I think more upon having a simply earth-killing computer machine.
Macs have traditionally offered us the advantage of interoperability of their files with labs and other studios. But I'm deeply afraid of Apple's ability to be total buttheads and trashing professional support.

The dual hex-core from Apple is $5649 while the dual hex-core from Dell is, oddly, $5420. The big difference between the Apple and the Dell is the video card. But the "Apple tax" isn't terribly high on the very expensive machines.
But I have no way to compare video cards to one another because video cards are a dark science of occult which burns the souls of all ye who dare approach.
The other strange thing is that the Dell actually comes with no real operating system. FreeDOS is what it has. I don't know what that's all about.
An Apple dual quad-core is $4149. So it's .73 the price of the hex-core and (theoretically) .66 the number of cores. Right? Who knows? My math is fuzzy.

These Apple machines are both spec'ed with the better video card that Apple has.

Dell's dual hex-core with 12GB of RAM.

The last two facts here are that Apple makes a (generally) stable machine. And the 24 months 0% financing is like... well it depends on what you think of interest. A couple hundred bucks? A thousand bucks?
Who knows?