If you’re looking for a buffer that has boost capabilities as well, definitely look into Brad’s Doozy Boost. It offers a similar tone enhancement to his Black Box.
The other week I plugged directly into my 67 Princeton which I usually find to offer the purest tone. But these days I actually prefer going through the pedalboard because of the Doozy Boost. Even when off and it just acts as a buffer it helps to make things shine a bit brighter. It kinda works some magic.