SDV 3100 HV owners

Thanks for the responses.  My speakers are Monitor Audio PL 300 ii, which I'm very happy with.  The Luxman amp has many outstanding qualities, but can be a bit polite and lacking in energy and dynamics.  I agree the A 3000 might be an obvious choice, but I can't find one to hear without driving hundreds of miles each way.  Another option that keeps coming up is the ARC Ref 160s.

I've done upgrades on cables and power cords.  I believe the issue is the amp.  After reading a few reviews of the Luxman M10-X (M900u replacement), it appears that it addresses the specific issues I'm not happy with on the current amp.  Again, the challenge is hearing it, hopefully side by side with my amp.  I'm afraid my future involves lifting and transporting heavy metal objects to find out!