Sometimes going ghetto is the best route, especially when you can save about $1200 big ones. Just ask the guys over at 1 Block Off the Grid. When they needed a fancy Mac to run Adobe After Effects, they decided to Hackintosh it. Meaning they built a Mac in a box -literally (a cardboard Amazon box acts as the "case").
Their Hackintosh creation runs Snow Leopard, has a Gigabyte motherboard, an XFX Radeon HD 5770 graphics card, a 2.66 Ghz Intel Core i5 processor, 1 TB Western Digital Hard Drive, 4GB (2x 2GB) Corsair RAM, 500-watt OCZ power supply, and a DVD burner.
The coolest part? The power switch is a "jumper on a twist tie that you use to short out two of the pins in order to turn it on and restart it".