If you go with an asynchronous USB DAC, you won't just have low jitter, you'll have *no* jitter. At just $499 the Halide DAC HD is a Stereophile Class A component with a hard-wired USB cable at one end and Eichmann Bullet RCA plugs at the other. The review and measurements show this DAC to be extraordinarily musical, smooth, and detailed. With the money you save you could get a MacBook Pro and add the remote control for a mere $19.99.
If you want an exemplary DAC that does both, look into the Musical Fidelity V-DAC Mk II, which accepts Toslink, coax, and USB, and the USB is asynchronous. Even if you add the aftermarket Pangea power supply, you're only at $429, which again leaves you more money for the computer, better software--e..g., Amarra--and some tasty 24/96 downloads from HDTracks. The V-DAC Mk II could service your Cambridge player and a computer with USB link.
If you want an exemplary DAC that does both, look into the Musical Fidelity V-DAC Mk II, which accepts Toslink, coax, and USB, and the USB is asynchronous. Even if you add the aftermarket Pangea power supply, you're only at $429, which again leaves you more money for the computer, better software--e..g., Amarra--and some tasty 24/96 downloads from HDTracks. The V-DAC Mk II could service your Cambridge player and a computer with USB link.