Looks like the Baryonyx Arctic Fox would be my starter stone if I go with that brand? at these prices I would be fine with buying two stones if that would be better in the long run, or is it better to focus on technique with a single stone to start?
I have a couple 420HC Kershaw Scallions, A couple Kershaw Shuffles 8Cr13MoV that would be my "practice" knives though I want to keep the Scallions in decent shape, carried them a long time and they are dear to me even though they are pretty pedestrian. The Shuffle was my nephews first knife and I got myself one to match, again sentimental but that thing looses it's edge quickly. I have a Leatherman Charge Ti with an S30V blade that is currently in good shape but hoping with practice I will feel comfortable sharpening that. And I recently got a Civivi Wyvern with D2, this is another "practice" knife and has the bonus of having no emotional attachment and I got it for $43 so if I ruin it in the pursuit of learning a new skill I will not be heart broken.
My knives rarely see hard use anymore, I work behind a desk these days but I do get to put them through there paces on the weekends occasionally.
Thanks for all the responses so far and let me know if the above info changes any of your answers or helps narrow things down.