Mac,
My music listening is probably 80 to 85% acoustic jazz with bands/combos of various sizes so we have similar taste. Teajay has these preferences as well so his comments carry considerable weight and I relate to them.
It just seems that based on his listening nearly any good quality built SET is going to really shine with the DI. Lower power tube push pull tubes would also be terrific choices, as it seems the DI takes advantage of quality power and doesn't demand high current/watts in order to sound good.
Having said that I wonder how well Teajay's big Pass Labs mono blocks were with the DI, my guess is they were fine as well.
Charles