platform & hardware

Hey Guys,

I do most of my development in XCode but I also have a background Visual Studio.
Until now most of my work runs on windows7, hardware is cheap and flexible.

For a new project I need a computer who can handle 6 HD screens and process kinect data.
So to save me some osx -> windows conversions I was thinking to buy a mac pro for this.

But it seems that opengl performance is slower on osx
http://www.pcper.com/news/Graphics-Cards/OpenGL-performance-compared-across-Windows-Linux-and-Mac-OS-X

What hardware do you guys mostly using regarding this type of setups considering performance and stability?

[glow=yellow,2,10]Thx in advance[/glow]