As part of a new build I'm looking for a sound-card with S/PDIF outputs that's well supported under Linux. I've usually relied on the motherboard's S/PDIF output, however the motherboard I've picked for a new build doesn't have any - not even a stub. I don't really care if it's PCIe or a USB dongle as long as it works reliably under Linux. I also don't need anything fancy. Any recommendations?