For a cool two thousand bucks (more or less, actually slightly less), you can buy a new Mac system with a terabyte of on-board storage including a generous SSD boot drive, 8 GB RAM, Quad-core Intel Core i7 processors, and Thunderbolt support.
And it's not a Mac Pro. It's a Mac mini.
Okay, let's be fair here. The lowest end Mac Pro in it's lowest-end configuration can wipe the floor with the highest end mini in a basic chip-off but when you add the other features in as well, it's not that much of a difference: 2.8 GHz Quad Core 3 GB/1 TB vs the punier 2.0 GHz Quad Core 8 GB/1.5 TB.
It's as