I dont have many high end folders, I guess my highest-end folder would be a GEC Tidoute mountainman (i think that was its name, not sure).
But my most carried and used knife is an old school saber ground endura 4. I have an ffg, but knife is mostly used to cut drywall, zip ties, and other construction-y things, so the saber ground one is better. Thats one tough as hell blade! I've used it to cut caulk out from between those steel+ceramic tiles used in gas stations. Thats some tough stuff!