I moved to DMT diamond hones about 15 or 20 years ago (I've yet to wear one out), and use them for 95% of my sharpening. Much more durable than natural or synthetic stones, much cleaner to use since you don't need water or oil, and far more effective on high-end alloys like S30V, VG-10, ATS-34, etc. I do keep a big Black Arkansas bench stone (inherited from a great uncle who was a cabinet maker), which I use on my high carbon blades (Carbon V, 52100) as it seems to impart a toothier, ultra-fine edge on those steels than I can get even with the DMT ultra fine. I probably spent around $200 all told, a good investment IMHO.