Jay’s seems like a real good option. But, you could also try a reclocker on ur Luxman and get good improvements for less. Empirical Audio and Wyred4Sound offer good ones. You have a great DAC so not sure how much a reclocker would help, but just another option to explore FWIW. Best of luck.
CD transports
I recently started running my CD player ( Luxman D380) through my external DAC and have found a significant sonic improvement. I wonder if I would achieve further improvement in sound quality if I traded in the Luxman and bought a dedicated CD transport ( price range 3-4 K ).
Has anyone gone down that rabbit hole?