@Buoyhead69 , Yeah, I just got turned on to that blog reading the ski comparison, that Horton posted on Facebook this morning. Though I knew about SkiJay before, and about fin whispering. But also read a couple of the other blog entries. One discusses when to make fin adjustments, etc. It posits that for longer liners, stock, or pretty close to stock setting from a good reputable source, is better than tweaking too much. Or so I read it to say. I am getting the book, but more to learn than to tweak too much from stock. I want to make clear that I do NOT feel qualified to recommend any specific ski, settings, binding, etc. to anyone. Just talking about my process and info I found (including the FinWhispering blog) here. That said, I think if you demo a NRG, you should also demo an ARC.
You are getting into 28 off, (which is also my goal, btw), and so your needs are changing. So your path might be different. I am using my calipers and wing gauges to make sure I am stock, and without some coaching input or input from SkiJay (you can send him some film for review), I don't plan on moving things too much from stock. But again, I am behind you in the course, and chasing you from there. The good news is it is all fun to learn about and play with. :)
I am interested to see what you choose. I, myself for me personally, believe most in trying skis and going with feel. What feels best. Along with what helps you get more balls, but to me that is likely to also feel best. I am looking forward to seeing what ski you think is best for your next steps. And also tracking your progress into completing 28. Keep us posted!