Erik,
Have you ever tried using your Brooklyn DAC as a preamp? Or is that just the “+” model that has that feature?
i generally have preferred to have a preamp in the mix but have also had very successful results going direct from DAC/preamp to Amplifier (and specifically to the 600a, though I don’t want to beat a dead horse).
That said, I also downsized to an integrated, so I know where you are coming from.
Just worth exploring all options to maximize musical preeentation/enjoyment.
j