While I highly regard the two amps you’ve identified, and given your speakers I’d go with the Luxman, but if you’re possibly open to a tube front-end integrated I’d highly recommend looking at Octave and Unison Research hybrid amps. Those preamp tubes last forever, and I think their neutral yet tube magic will set your speakers free. That’s absolutely where I’d go, and you can fine-tune your sound with different tubes if desired/needed. Best of both worlds IMHO.
