I would strongly advise against that soundcard. Not because it's bad (it might be ok from a sound quality standpoint), but because it is a consumer product in the audiophile realm. You are not a consumer, you are a sound professional. The target market and its requirements are very different.
Getting an external audio interface that connects over usb or firewire is almost always advised. Less interference because the audio path is not inside your pc, easier access to the connectors, more sturdy connectors built for repeated plugging in and -out, physical volume controls and, depending on your budget, better sound quality, portability, flexibility and extendability.
Also (depending on the model): balanced inputs and outputs, microphone preamps, midi, etc.
Stay away from brands that also make motherboards or laptops, stay away from Creative and preferably also Terratec. Not because they make bad products but because you will at some point run into the limitations of the stuff they make, requiring you to buy something else. I speak from experience (I've bought 7 audio interfaces so far, sold 5).
Brands to look at:
Low Budget but good bang for the buck:
RME (they have some good internal sound cards too, this is an exception what I said before),
Apogee (Mac only)