If you’re interested in ergo, I recommend visiting the ergo keyboard comparison tool [1] to get a sense of how deep this rabbit hole goes. And you can now use YAML to prototype custom layouts via Ergogen [2]. [1] https://jhelvy.shinyapps.io/splitkbcompare/ [2] https://ergogen.cache.works/
I wish there was a showroom or something I could visit to try them all out and see what fits my hands. I don't mind dropping $300 on a keyboard once, but I don't want to buy 10 different keyboards just to try them and then have to sell the ones I don't want.
I think the problem with a showroom is that you really need to invest at least a week or two to get used to the split keyboard. But for me, it was totally worth it.