Given that you have a you have a DAC, have you considered a Meridian Transport? They sound great, and the market for them has gotten soft pretty much across the board.
For about the same price as a used Saturn, you can pickup a Meridian G98DH, which while dated as a DVD is still a crazy good CD transport.
Another option is the Oppo95. Again, for about the price of a used Saturn you get good sound and, as spindles go, is about as future proof as it gets.
Yet another option is to acknowledge that the Saturn is a great player, and to simply enjoy what you have.
At the same time, I was recently in your shoes. I upgraded the Saturn to a Naim CDX2, which was absolutely amazing. I ended up trading it back after a year b/c I didn't feel comfortable having that much cash tied to a then 7.5 year old spindle. I did find a pristine G98DH which I still own and happily consider a keeper.