Apple's Mac Pro has design innovations that we hope will cross over to other systems. Its performance is as strong as you'd expect for a system in its class, and it's priced right, too. You might need more flexibility in your config options, especially for 3D design, but otherwise, the Mac Pro is as solid a professional-class PC as we've seen.
If you thought dual cores were over the top, get ready. Intel presents the Core 2 Extreme QX6700, a single CPU with four distinct processing cores. At $999, the first quad-core CPU will remain an enthusiast part for a while, but as a glimpse of the future, it's clear that clock speed is out and core counts are in.