They are all great truggys. The Mugen does break. I drove one for 8 months and I broke several arms. At med events 120+ entries I always pull at least 1 broken Mugen off the track due to a broken arm. They handle great I just wish they would fix the brittle arm deal.
I haven't driven the Durango but it looks great on the track. Personally I drive a Serpent. On that list I would go Serpent or Durango.