Best upgrade for cd player?

The Denafrips Venus ll should be a significant improvement in every parameter, or you can also probably do better on the cheap with a Gustard A22 or the new Soekris DAC2541.  Just a few to chew on, and best of luck. 

jimmy2615

Nice score! on the SA-10.  Happy Listening!

Why don't you let Modwright do it's thing on it?  Really, I had an Oppo for a while and never could get used to the CD sound.  They are going for such good prices, if you don't modify it, why don't you sell it and buy a better player? A friend of mine with very good ears replaced a Linn Klimax server with a Modwright 105 and much prefers it.  I didn't hear it myself. 

+1 on the Audiolab 6000cdt and a good DAC. Mine is paired with the Schiit Gungnir MB. The results have been very good.

I don't think there is one for nuance, detail and dynamics.

All CD player sounds are notoriously close and differences are subtle to say the least. Try comparing a budget machine to a top of the range one.

Or even a Blu-ray / DVD one.

On the other hand a careful loudspeaker upgrade might well give you all 3.