my main rig is almost 6 years old,but will and still does run circles around almost anything out there i have seen.the only exception may be the new rig i am building for myself or someone who is in desperate need of a great machine.here's the specs on my machine:

processor: two 3.2GHz quad-core intel xenon

memory: 8 x 4GB RAM(32GB total)

RAID card: Mac pro RAID card for my multiple hard drives

internal hard drives: 1TB 7200rpm serial ATA 3GB/s
1TB 7200rpm serial ATA 3GB/s
1TB 7200rpm serial ATA 3GB/s
1TB 7200rpm serial ATA 3GB/s
1TB 7200rpm serial ATA 3GB/s
1TB 7200rpm serial ATA 3GB/s
1TB 7200rpm serial ATA 3GB/s
500GB 7200rpm serial ATA 3GB/s

external hard drives: WD elements 750GB
WD elements 500GB
WD my book 2TB

graphics card: PNY quadro FX5800 VCQFX5800-PCIE-PB 4GB GDDR3

display: apple cinema 30" HD screen x 2

network interface card: quad chanel 4GB fibre channel pci express card

OS: mac osx leopard(unlimited client) and ubuntu on a allocated partition

SAN(storage area network): Xsan 2

this is my baby out of all of my machines,desktop and laptop,and has been worth every little bit!!