I scored two Norton stones recently. Both are replacement stones for the Norton Triangle system(about $300). I have the medium crystolon, and the fine india, both large stones ( 1/2" by 2 1/2" by 11 1/2") The benchstone suggested above is versatile, economical,and recommended by more than a few good knifemakers.
I can say from experience, I get better edges than ANY of the diamond stuff I have ( which is a whole lot of DMT stuff). I'm pretty good at free-hand,but those Norton stones just seem to remove the right amount of metal. I do the " Juranich" method of using them dry, but I do clean them periodically with WD-40 during use if the swarf builds up. (BTW, WD-40 is an excellent cleaner for a lot of things;not-so-good of a lubricant, IMO.) I don't particilarily like highly polished edges:they slide of matter too easily,instead of grab-and-cut. Just feel the factory edge when you get a new one.
My suggestion for guys starting out, is to get that Norton India combo stone(around$20-$30 ), and start with that, before spending a ton of coin on diamonds. That being said, small diamond honing rods and stones ( DMT paddles,Eze-lap rods,etc.) make great bush carry- along units. Really, who wants to carry a benchstone around in the woods?
Today I did some whittling with my new RC4, and the factory edge is great!! 1095 rocks. It's one of my favorite steels.