With the newer cards being released, You'll get all of the newest codecs by just plugging up an HDMI cable and using it with a processor or receiver that accepts the new formats.
Here's the info on the card Patrickp mentioned in a prior post Asus Xonar HDAV 1.3 sound cards released .
Here's the info on the card Patrickp mentioned in a prior post Asus Xonar HDAV 1.3 sound cards released .