What is the reputation of Master something as an engine maker? I am not sure of the name, but saw MSTR. Compare to Atlas/Athearn
Atlas has a Master series; the Atlas Master™ Series Gold with QSI® sound, and the DCC ready Atlas Master™ Series Silver. These are their top of the line.
Also note, with recent corporate changes in China, almost all models are now made by Kader, Bachmann's parent.