The Rossi is a bit heavy as Bob eludes to above (Mini-tuned pipe is a solid option)... VERY powerful and runs happily on 0-5% nitro.
I am not familiar with the MDS but I would bet it generates its power at lower rpm's meaning you would need to prop it as such, and that much torque could be a problem on a small W/S bird.
I have never had an MDS or Shrike so maybe I should just shut up...
The Shrike ARF is on sale at Tower for $124-