I'm sorry but I can't offer any additional help on this subject.
I know Charles has a great system along with the knowledge to make solid decisions. When he mentioned his respected friend auditioned a few quality candidates and Charles was enthusiastic about the Nikola II's performance in his own system as well, that was good enough for me.
I've been fortunate in my audiophile journey with only the RS2-T giving me warranty issues through a long career. Some of your legitimate concerns being warranty and service did not weigh heavy on my decision.
Things continue to improve every time I listen. Good recordings are exciting to listen to with a lot of break-in still to go.
I know there are many fine choices you can weigh your pluses and minuses. For what I was trying to achieve the Nikola II was an excellent choice.
Best of luck with whatever LPS you choose, and I'm sorry I couldn't be more helpful.
LP