Call Audio Classics and ask their opinion, they won't steer you wrong, or BS you. The DAC 1 in my C2500 is fine for what I use it for, but I am not really a fan of the Sabre DAC.
Macintosh dac-1.
I am interested in updating the mcintosh dac-1 to the dac-2, is it worth it or should I look into a stand alone dac.