Now wait a minute, you can't count the almost $300 of tax as part of the cost of the system! Taxes vary. You have to compare apples to apples, so to speak. The real question is, would you pay $425 to have Apple build it?![]()
My bad... I actually meant to not include the tax and shipping, but yeah... I'd probably pay $425 to have

I'm sure I'm forgetting a few little extras too... so it would probably be even closer. A solid Silverstone aluminum case similar to the Mac Pro's would be closer to $300 than $169. The Apple memory and hard drive would be slightly more too so... "bang for buck" the seemingly outdated T.O.T.L. Mac Pro is [practically] the most we can get at the moment.
The minute Harpertown Xeons are available to the public and Apple hasn't upgraded the MP... then the tune will change.