It really annoys me to hear people whine about the cost of these machines. First, if you've wanted a new one it's not like you haven't had YEARS to save. Second, they're called a MacPro for a reason...Pro, as in "Professional." Some of us actually use this machine for our livelihood. These machines are the workhorses that get our jobs done quickly and efficiently day-in and day-out. Finally, whatever the cost is, it's easily made back many times over by the job it helps us do and the productivity that is gained with it's speed and stability.
To borrow a pharmaceutical term, if you are using this for gaming it's an "off label" use. You are not the target market. These machines are primarily designed for creative, scientific and IT-related professionals. So, if you choose to use these machines for purposes other than their intended use cases and then whine about, you're not going to find a lot of sympathy here.
Now if you'll excuse me, I need to get back to my Mac Pro and generating some solid income with it.