We took delivery on a new 2014 Sunstar recently and have a great deal of wind noise (driver side of the MH window) Took it in to CW and they were really perplexed by it but said they would work on it....
Don't know what your mirror set-up is like, but with my Winnebago I had a very bad low harmonic type sound, found that if I pushed the drivers side mirror as close to the coach as possible the sound quit.