I don't know why he is using Macs, but after seeing some of the clustering-features present in OSX, I know why I would use them.
And the new Mac Pro are some pretty impressive machines as well and not that expensive when you consider the quality of assembling, support, reliability, ...

nice set you got there...

I think I just busted a nut to my first mainstream photos.

im guessing it can, i have a 12,000 btu window unit added to my room - with the central air set at 76 and the window unit at 68 the room can push 70 on an extra hot day but generally is 68-69

my dual core intel 3.4s are all overclocked a bit and run low 40's, hdd temps are low 30's

i worry the cops will show up one day wondering if i have an herb garden because of all the juice i pull

Ok that is damn sexy

You said it Mark.

Many people ask why i use macs and the answer is so simple. Clustering.