The M-Audio sonica seems like a good choice. It's just like the Edirol, apparently, in that it has one coax and one toslink output. M-Audio makes good stuff, but I haven't used the sonica before. Considering the source material, I'd go for whicherver one is most affordable.
http://www.m-audio.com/products/consumer/sonica_page1.php
http://www.m-audio.com/products/consumer/sonica_page1.php