"No Blu-Ray...So what?!"4.0 stars
Pros: The MacPro is a blazingly fast and very high quality machine. It is fully dual bootable and can run almost any operating system you can throw at it. Most users will stay in OS X 100% of the time, but you can also load Vista/Games without a problem.
Cons: Some complain about no Blu-ray, but with HD downloads on the rise, Blu-ray becomes less important. If you really need Blu-ray, get an external burner and/or a PS3.
Summary: Like most current Macs, the Mac Pro delivers great bang-for-the-buck. Just check the specs carefully and also consider the quality of the parts when you make the comparison. You can buy less capable, stripped Windows boxes for less, (Apple doesn't sell bare-bones computers) or spend a lot of time sourcing parts, building a machine yourself and then dealing with driver issues and incompatibilities... but if you are comparing ready-made systems, Macs are very competitively priced. .
Even with the old price-premium, Macs have always been cheaper when considering the Total Cost of Ownership. I know this since I've been using Windows, Mac and Linux machines for many, many years and currently work as a systems administrator working with Windows Server, XP, Vista, OS X and OS X Server.