Buggtussel's

Buggtussel speakers from Michigan has a model, "Amygdala" which I briefly heard last month at an audio shop in NYC. I did not get a good listen, but was impressed with the deep, impactful bass and dynamic range. Does anyone have more "performance" information on this speaker?? I listened to this model in a very small room; how might it perform in a medium to large room?? How might they compare to the Gershman Acoustics Avante Garde RX-20 which is about $4500 at retail, whereas the B's are $4000???