There are DA's and 106's in my club. I chose the DA on the basis of vibration and throttle transition. Perhaps the 106 isn't tuned as well as the DA's, but at the top end, the 106 has more brut power without question. The DA's work well w/ Menzs 27x10's. The 106's were ripping the Menzs 27x10 on the first day.

Ryan