Just opinions here.
My two favorites, that I have owned and handled multiples of as of now.
CRK 21 Large- Just works and works. Sleek, tough and a great cutter. Lock has a loud clack with alot of strength, perfectly executed. The S35VN is executed perfectly between Reeve and Crucible. This is the most uniform steel that I have ever seen on a knife.
Leu Bluefin- This is the larger folder.I have handled multiples of these. All five that I handled have a tad too early lock up and need a little more spring in the lock . Otherwise, that is not an issue at all. It will wear in , and you can just add a tad bit of bend to it. BOY WHAT A SLICER!