I have had the CODA CSiB, #8, and now own the #16, I love the Benchmark LA4/HPA4 preamps with the CODA’s. I also like the Holo Audio Serene with the #16. My current setup is with the Serene and the #16, Mainly because the very neutral DAC I use seems better with the Serene than my HPA4.
I use the HPA4 with a warmer DAC in another system. I do not like that DAC with the #16.
So, it is a bit of a matching game, the #16, HPA4, Serene, and 1 of my 2 DACs are long term keepers for me.