Best upgrade for cd player?


Want more nuance, detail, dynamics.
ptss
An external DAC can add much, as can power cords on both. I added a Benchmark DAC 3b to a Sony XA 5400 ES and am very happy with the results.  Audioquest cords for both.
Agree with richdirector. The Audiolab does what a transport is supposed to do; with my Neko Audio D100 MKII DAC, it sings. Better than with the Chord 2Qute DAC I had previously. Read on the Neko site on why it sounds so rich and warm.
@dino & midafeff1. I use an MIT Oracle power cord which I've found to be good and I agree with you the pc's are important.