Are you telling me that I may confront a similar problem...I can't afford to have regrets.
In consumables industry, you will never know anything if you do not try. I've owned many grinders, machines, burrs, tried all methods, etc. After trying everything, I have concluded that
for me and my tastebuds, my simple setup is enough (or that my moka process will get me 75% there).
If you've never experimented with the various sizes in flats vs conical, the cut patterns, change in grind speeds and sizes, metals, then water pressures, temperatures, and TDS, etc, you won't know what you're missing on to have any sort of regrets. I can't feel what a watermelon tastes like to
your brain - someone could tell you what it tastes like to him, but it may not necessarily be that for you. For example, I thought I would like Sweetlabs burrs, but after trying it out vs SSP MP, SK, and HU, I surprisingly found out that MP tickled my brain in a way the others did not - which was completely contrary to my original hypothesis.
If you don't want to have regrets, you must try them all. If you can't afford to have regrets, don't try at all.