I had no idea you could use the Mac Pro on its side, but according to this Apple support document, you can.
Mac Pro
Mac Pro and Final Cut Pro 10.1
The Mac Pro is quite incredible. Watch the movie at the end of the article to see just how much power this machine has.
Making the new Mac Pro
It’s amazing what they go through to make it.
Guy English on the new Mac Pro
A lot of people are probably going through this same type of thinking. Of course, there are others that will just grab the Mac Pro as soon as it’s released.
The Mac Pro from an audio pros perspective
I really like the new Mac Pro and since I use mostly external rack units and other gear, the lack of expansion slots is fine with me. Many studios won’t be upgrading right away, and when they do, there will be a lot more gear that supports Thunderbolt and other I/O options. Peter Kirn has a nice look at what the audio industry thinks of the Mac Pro.