If you are planning on using the KXDrivers, according to their website, that card is currently not supported. See the link for supported/unsupported cards:
http://kb.kxproject.lugosoft.com/list.html
That is not to say that one day the card will be supported by those drivers, just now right now.
Yes, it will work as a second audio card/zone. If you wanted only digital out then there are better cheaper options, but for analog out that's a good choice. I'm not sure if the card supports multiple zones in and of itself. I'll look around and see if I see anything.