Gotcha. I have the same duo situation with my wife. I use a Boomerang on the floor, and two vocal mics for she and I. Then a Telecaster, and maybe an acoustic or archtop sometimes. In that situation, I've used a SF Princeton, a SF Champ, Boss Katana, and I currently use a Peavey Classic 30 since I like to use the looper in the effects loop. My favorite is the Peavey, but mostly because of the effect loop. I really liked the Princeton as well. I keep the volume low, and I can still get that robust low vibe you might desire when backing up a vocalist. The champ just never cut it for me, especially outside. My two cents.