I think you got what I was trying to say. Look, I don't have any Jnats, and frankly I've only shaved off two Jnat edges, one from a fairly respected ebay seller and one from Alfredo (Doc226). I can say that Afredo's edge beats my best ark edges in keenness, no doubt. Not by a mile but enough that it's perceptible. My best ark edges, though, do seem to be marginally more comfortable-- that is to say that I get less feedback from the aftershave after a 3.5 pass shave. I have, with a lot of work, made an edge or two that can compete with Doc's edge for sharpness/keenness but they were not nearly as nice to shave with as his.Thank you, Matt. I hope I don't skew your meaning. As I understand your post, a fine (fine quality) Ark. is comparable to a JNAT progression, with much of the weight borne by the man sitting at the rock. If that's the case, I wont be running to pick up the best Ark. I can. I would first experiment with a variety of Tomos, or as I understand @Titleist, perhaps with different Komas--or combinations of the two.
Other folks with far more experience honing than I seem to agree that a good ark and a good Jnat will each get you in the same ballpark, at least. Again, I can't say how a good ark will compare to *your* stone and *your* naguras. For comparison, the other Jnat edge I had, while serviceable, wasn't in the same league.
On the other hand, at the risk of being an enabler, you can get a 6x2 "Dan's Black" for about $100. I haven't priced out Komas lately but you get the point. Smallish coticules are another option for not a lot of money. I suspect that the best examples of any of these stones will get you to a similar place-- but the journey will be different.
My actual advice, for what it's worth, is to spend some time experimenting between tomo slurry and water only. Water only can be challenging on some stones but you may be able to push the edge a little further. You may also discover that you don't want to shave with that edge, or a least not all the time.