Yogiboy, I’m glad the SHL5 Plus has lived up to your expectations. They are good speakers. I suspect the Quicksilver tube amp brought out the best in the Harbeth. I have used solid-state amps with the Harbeth all my life, about 12 years and the speakers sounded good but not exactly spectacular. Apart from the Quicksilver, the Harbeth also sounds great with Leben.
I’ve recently moved on from the Harbeth to Graham LS5/9. I find the Graham to have better clarity, detail and openness than the SHL5+. I am currently driving the Graham with a Luxman solid state.
Enjoy the Harbeth SHL5+.