Dude you currently own a Mac Mini? LOL.You are a processor intensive guy? The last time I checked the Mac Pro's can power 4 30 inch displays without the FX4500 card. What exactly is a dual-dual opteron? Is it faster than a dual core mac mini?
My Mini is my home box, and is currently on the blink thanks to an unhappy power brick.
The two processor, each dual core (dual dual) Opteron is my number cruncher. The Mini is my daily driver since it's silent and does all the normal stuff I need. I fire up the supercomputer for the heavy duty stuff and then just use a Leopard Space for an RDP connection.