Im no expert, but Spyderco Endura (50$) for me. I have an identical pair, and they are the only folders I plan to keep (Para2 anyone?). Perfect folder for me, yet not too expensive for hard work. If you don't mind the weight, or cheaper steel, the Kershaw Tremor is great value and it's larger. I gifted one, but kept a Resilience for myself, that's one that's hard to part with. It's the same size and steel as the tremor yet much lighter with better ergos. It's 40 vs 25 for the tremor though. If the Endura is too pricy, consider the Byrd cara cara 2 Chinese version.