WTB: USB / External sound card - 5.1 / 7.1

[Nomad]

I am setting up a HTPC and need an external sound card that supports an optical out. I used to have an Audigy 2 ZS notebook version (PCMCIA), but I can't seem to find it. That would work well here.

Any other type of USB / PCMCIA sound card may work - but I want decent quality, as I will be playing back BR to a receiver and onto the TV.

I have solid heat and ebay feedback.

Thanks for looking (and the occasional bump).