The Q200 does exist....it was an update to the old -200 series to include the NVS system. Not all -200 are considered "Quiet" however. I don't believe Mesa's are Q series. Here's a copy of the description on the Bombardier website:
"Like our CRJ family, the Q Series-as the Dash 8 has been known since 1996-also flies in three sizes: the 37-seat* Q200; the 50-seat* Q300, and; the highly advanced 70-seat* Q400. In fact, the Q Series introduced a whole new generation of turboprops with its revolutionary Noise and Vibration Suppression (NVS) system. NVS lowers cabin noise and vibration to levels previously unattainable in a turboprop… lower in fact than many commercial jet interiors. And, the Q Series also carries a common type rating, maximizing the benefits of common crew qualifications."
Catch a ride on a smile!