I am far too anal about sharpening my tools, especially in the wood shop. I like King brand Japanese water stones for my hand planes and Trend brand diamond "stones" for knives, chisels and router bits.
The diamond stone I use:
https://www.amazon.com/Trend-DWS-CP8...s%2C230&sr=8-5
For sharpening knives and chisels, I only use the 1000 grit. The 300 grit is perfect for lapping water and oil stones and that is really the only time I use it. Unless you are sharpening carving chisels or hand planes, I cannot see why you would need more than the diamond stone.
The best advice I can give is be prepared to invest some serious time developing muscle memory.
Don't go crazy on the grits, especially for just knives.