It is obvious that you understand airguns and understand how people self inflict many of their issues. Just because the Impact can be adjusted tons, It doesn’t mean you have to, just as you said. And for those that say you don’t need that much power... fine, dial down the power and get a ton more shots!
In the FX line, I have had two Impacts and now have a Crown. I haven’t needed to touch anything but the power wheel to shoot different pellets. Never a single problem with any.
In the end, buy from a place that is going to set it up like you want it, for the power and pellets you want it, and that checks it out. SPAW did that for my last Impact and my current Crown and I couldn’t be happier. I’m not an FX fanboy but I’m just not an FX hater either. My next rifle might be my third Daystate if I can talk myself into it, but I’m in no hurry the way my Crown is shooting.