The answer is easy based on you saying you spin CDs. I owned this player and you only need the upgraded caps and resistors on the analog board to get the whole Signature upgrade when spinning CDs .
I replaced the cheap yellow caps with Jupiter copper foil caps and Dynamicaps. I replaced the 4 resistors with the Vishay nude Z foils.
this is all that is upgraded on the analog board with the Signature upgrade. The total cost for parts was about $400.
You our will have better resolution, darker background, better micro details, and a more airy top end.
I replaced the cheap yellow caps with Jupiter copper foil caps and Dynamicaps. I replaced the 4 resistors with the Vishay nude Z foils.
this is all that is upgraded on the analog board with the Signature upgrade. The total cost for parts was about $400.
You our will have better resolution, darker background, better micro details, and a more airy top end.