Buffalo/ Bison DOES have a higher protein content than does regular beef. It is also MUCH lower in fat.
I buy at least a few pounds a week at the Farmer's Market here in Austin. It's all grass-fed, no hormone, free-range and completely organic. To some it doesn't matter whether it's free-range and organic, but it does for me. All my food pretty much is organic / free-range. THERE IS A BIG DIFFERENCE, in taste and health. The side is the price, but IMO, it's all worth it. We are what we eat...
Check out this site to learn more about the advantages of buying organic:
www.themeatrix1.com
You can order Buffalo/ Bison from here (their the ones @ our Farmer's Market):
www.ThunderHeartBison.com