So many of these suggestions seem that they might hit home for you...
I’ve heard nothing but great things about the Adcom amps in a modded config. Some prefer to completely start from scratch, personally I’m into the additive/change a bit at a time philosophy.
I’ve got a Schiit Uber 2 that sounds great. Can only imagine what the Multibit here on Agon would sound like! Pair that with a Saga or Freya and keep your Killin Adcom, good cables. I’ve considered that exact configuration for myself. The good thing about those preamps, they can opperate in active/passive/buffered modes so they’re flexible (not sure if they both go that far, but at least Teo out of three for the saga I think). You can tailor your sound depending on the recordings.
Couldn’t go wrong with that?
Yep, I don’t know. I might buy that Multibit for myself! Jk ;)