DAC bits should be set to 20 in case you decide to not convert everything to DSD.
I find that I tend to prefer Nx set to poly-sinc-gaus-hires-lp. The difference between it and poly-sinc-hires-ip is subtle to be sure. It may come down to the genres of music I listen to most (various rock genres from the 60’s, 70’s, and 80’s).
With Jazz I really liked the XTR filters…but I still like the gaus filters the best.