How about the grits in general I know thousand is a decent finisher a lot of people like to finish with 2,000 what is the 600 usually used for? I know material has something to do with it I guess based on what I mentioned
Now you're getting into a different kettle of fish.
The 600 grit, (which is considered "fine" in the DMT line, and medium-ish elsewhere), is a perfectly acceptable place to finish depending on what you want to achieve with your edges.
Some of the most respected members on this sub-forum, (by my lights), prefer
coarse edges on their EDCs. (DMT 320, perhaps even Fine India. It's steel dependent.) As one mentioned the other day, don't confuse "coarse" with "not sharp".
It really comes down to how
you prefer your edges and how you use your knives. Perhaps a little experimenting might be in order.
1095 and AUS8 will take nice keen edges. I'm not familiar with 4116 off the top of my head.
As for recommendations, I'd recommend buying quality hones in a variety of grits. You don't have to go overboard, but you could easily put together a nice little set which covers the range from coarse through fine (or extra fine).
Norton Medium Crystolon / Fine India would work well with the steels you mention, as would DMT diamond hones...as would the Spyderco ceramics...but the ceramics are mostly for touch-ups and finishing as opposed to a full on sharpening.
I'm not as conversant with water stones as my experience is limited to a couple of small hones from Lee Valley, and those I use with my Edge Pro as well as a pair of recently purchased Shapton Glass bench stones.
You don't have to buy the very best...but don't buy the cheapest. You'll be disappointed in short order imho.