Mac Pro Review: Mac Pro Is a Lamborghini, but Who Drives That Fast? - WSJ.com

Excerpt from a pragmatic review

"My recommendation: Buy an iMac now. It is the Lexus of desktop computers, but trust me, it will handle whatever you throw at it. In two to three years, upgrade to a new one, when the technology has moved along. The price of two computers over five years will still be less than what you'd spend on one 8-core Mac Pro.
People who favor Windows may wonder why I've focused on Apple. The answer is that most consumers who spend more than $1,000 on a computer buy a Mac. For those people, the question is which one."

Mac Pro Review: Mac Pro Is a Lamborghini, but Who Drives That Fast? - WSJ.com