I have owned a Luxman L-509u powering Verity Audio Parsifal Ovations speakers and more recently a Luxman L-595A integrated amp. I own a Sim Audio Moon transport and have looked at some of their amps but have not had any in my system.
The Luxman build quality looks to be at a higher level than Sim Audio. Not that Sim Audio is bad, just that Luxman is more refined.