I love any Klon style pedal with the smallbox. My favorite is the ceriatone centura. But, to be completely honest, I think the smallbox sounds best when running the gain wide open on all channels and riding the volume knob to vary the gain. I feel like I get more bass, less compression, and less noise that way. So many flavors can be achieved on this amp through different drives / settings. One of the best amps ever!