My understanding is that spdif outputs do not send game sounds "accurately" and that if you play games at all, monitors with a built-in dac being fed by spdif might not be the best choice. The analog swans on the linked page above look nice, I've been really happy with my cambridge soundworks satellite/subwoofer setup too.
If you're looking for a soundcard with nice sounding analog outs (and a bit-perfect optical spdif out), be sure to check out the Chaintech AV-710, which runs a whopping $25 from newegg.com and zipzoomfly.com. It can be configured to send the analog out via a VERY nice sounding wolfson dac.
Darrin