I listend a lot to Mark Levinson amps in my life. I still don't understand why people would want to buy it. Holographic sound is the most important part in highend sound. This is a part were brands like Pass are superior. Let's take another part, focus. Many times I was stunned that clients who use Levinson are not able to let me hear the right dimensions of instruments and voices of a simple acoustic recording. I think they do not know how small and direct a voice or instrument should be. Sound, all classical cd's I played at Lenvinson sounds far from real. A violin sounds so much warmer and is better focussed than I ever heard from a Levinson. Use a recording with two different acoustic guitars. The levinson is not able to let you hear the difference. But a Pass can. The last years I heard many tiems the new Classe amps. To be unnest it does not do anything wrong. I think many peole could live with this for a long time. Compare it with Pass and you understand the difference. The sound of instruments is a lot different. Pass labs gets closer to the real sound of instruments. I think XA series I would take a listen at and compare it with your own music with the other ones.