I think some of the top folder makers would be Benchmade, Spyderco and Cold Steel. Good personal defence knives. Easy opening with strong locking mechanisms. I also like CRKT, Al Mar, SOG, Timberline, Wenger and Kershaw. I'm sure there are other knives out there that are fine, I just can't coment on those that I have no experience with. All my folders are for personal defence, one hand opening with belt clips. I prefere straight blades to serated. Spyrdeco's are nicely built but the serations are not my favorite.