When Apple's ever-so-slightly refreshed Nehalem-based Mac Pro showed up on our doorstep, we were understandably taken aback by the enclosure. Sure, it looks exactly like the previous Mac Pro externally, and only slightly more beautiful internally, but it's hard to deny the gorgeousness of this metallic wonder. That said, the so-called cheese grater design is one that's mighty familiar to Mac fans by now, so we'll spare you the details there. What you're probably wondering is whether or not this rig is really worth the steep asking price. At $2,499 for a single quad-core 2.66GHz rig and $3,299 for a twin quad-core 2.26GHz machine (which is our test system, by the way), neither option is particularly "affordable." And outside of the refreshed Intel Xeon processor, there aren't too many new hardware components to really convince you that an upgrade is a dire necessity. Follow us past the break to get a real-world perspective on the value proposition, and moreover, to get a better understanding of who exactly benefits most from a workstation of this magnitude.