Sound card suggestions

I have recently bought a Bryston intergrated amp with a built in dac, toslink and spdif connections only. At this moment i am using a Macbook pro with an Apogee Duet connected to the standard rca inputs.

I am currently buiding a pc to use as my music server to utilize the dac in the amp which should be alot better than the duet.

I am looking for a good sound card with s/pdif output for stereo playback. Most sound cards are geared more for gaming and surround sound which is of no use for me. I've seen some professional card on the market, but none with spdif output. Cost is not really a factor. I will probably sell the mac and duet to pay for the card.

Another question.

Which is better s/pdif or toslink.