TBH, I don't think you're making the most of the Gold range with a budget Yam or entry-level Creek. Perhaps try Creek Destiny, Arcam A38, Leema Pulse, Roksan Caspian.
I own the RS6s and MAs do flourish with a mustard amp. Sound wonderful with my Leema.
Strange really, some people can have the warmest combination of amp and speakers and still complain about it being too bright at times. This can be down to a number of things: Crummy room acoustics, rubbish recordings on CDs or downloads, perhaps mistake brightness with clarity... or maybe all those.
Mention Monitor Audio or Focal to some members and their ears start to bleed.
Swings and roundabouts I suppose.