I might add that anyone listening to PC based music library and not using jRiver Media Center should really give it a try....it is free for 30days, has very good support on their Interact Forum, and is built with the Audiophile in mind.......depending on your hardware it doesn't get any better for PC based users. Another excellent device is the Musical Fidelity V-Link, which is basically a USB sound device that converts the USB output to SPDIF, either coax or optical, or both depending on your need. The V-Link provides asychronous clocking and eliminates jitter, giving a clean/clear signal fed to you DAC or receiver. The V-Link can be had for under $100, best money I have spent to improve on sound, along with jRiver Media Center.....worth looking into for the serious listener!
I second this. I've been using jRiver for a while and no matter what other program I try I always come back.