...but do not buy from Creative. They're overpriced crap with dubious driver support - the last card worth buying from them was maybe the AWE32?
Also, you need to have real speakers. And if you have a real amp to go with those speakers, it probably has SPDIF and you don't need a discrete sound card
Sadly, the competition (Asus Xonar for example) only cares about Windows as well, so they're out of the question.