I use either the Kin or the Topping Pre90.
I did some light modifications to the Kin for things that annoyed me yesterday. Just minor things, so the topping is back in the system today.
I built my 686 to take either single ended or balanced inputs.
Eventually I want to add a 2nd TT and then use the Kin stage for casual listening, and the BB3 through the Kin for proper listening sessions.

