Gerber Applegate-Fairbairn Covert uses 154CM and opens like a breeze. I had to put a new edge on mine because the factory edge kept chipping. Don't know why and other folks don't seem to have that problem. The edge that I put on it is doing fine, no chips. I find that 154CM is easy to sharpen on bench stones. I use the hell out of this knife working out in the barn and it stays sharp for quite a while. As far as size goes, it's on the small end of what you're looking for but that means it rides well in a jacket pocket whereas the 5" and 6" blade folders don't always fit. The pocket clip can be attached to either side and it carries thumb stud up, rather than pommel up. It also has a lanyard hole, if that means anything to you.