MP 5.1 sound in Windows via Boot Camp

[aaronw1986]

I'm a litlte concerened with audio in Windows. People have said you cannot get 5.1 sound from the built in hardware/drivers. Would it be fine to assume that you could add a pci-e sound card that would only work in Windows? For example, this from newegg...

http://www.newegg.com/Product/Product.aspx?Item=N82E16829102017