Every year I get a few clients wanting Buffalo Grass; I am not a big fan of buffalo grass for a few reasons.
1- It has a dry- grey appearance
2- Because it does not green up until the Night time temperatures are in the high50's the weed will green up first making the weeds standout.
3-IT will not stand up to any traffic (Dogs or Kids)
For More Information:
Plant Talk Colorado http://www.ext.colostate.edu/ptlk/1512.html
Colorado Master Gardeners http://www.cmg.colostate.edu/gardennotes/565.pdf