I'll have to show this site to my step-father-in-law. He was a drummer for buffalo for a few years. He said they were always lumped in with Sabbath, but really they were N.W.O.B.H.M. This site lumped them with Sabbath as well.
He has a few great stories. I think his favourite is being able to say Iron Maiden opened for them (due to losing the coin toss)! haha
But like you said, this site pretty fucking awesome.