Since you posted all those knives Knife Guy, I have to ask, how do you like the Greco, the knife from the 2nd picture 3rd one down, and the Byron.

I'm more interested in the Greco. I've been looking at his work for sometime and am inclined on getting one of his tank like folders.

I guess specifically what I'm interested in is the steel. I've never actually used 8670. Though they seem more like fighting designs than actually survival. A good lot of them have long and shallow swedges.