You might try the California Audio Labs Alpha DAC. I use it with a California Audio Labs Delta transports as well as with a CL-10. It doesn't "do" HDCD CDs, but those CDs still sound better (warmer, deeper), to my ears, through the Alpha DAC than they do through the CL-10 by itself.
DAC for Cal Audio Labs CL-10
I have a Meridian 588 and a Cal Audio Labs multi disc CL-10 player. I also have Nautilus B&W 802 speakers and a Bryson 4BST amp and BP-25 preamp along with Audio magic power conditioners. I am wondering if there is a $500 DAC that would improve my multi disc sound output? I listen to female vocalists and jazz and would love to hear any suggestions to try.