LF: External Audigy 2 sound card (or any sound card for laptops)

For my laptop. These are the three ext sound cards you can get for laptops, but very hefty prices. The Q is, the $69 card is not badly priced, but its not even Audigy one. It is 24bit and 5.1...so the Q is, would I notice a difference using that card as compared to the Augidy 2's? What defines an Augidy card? Is it just hype? Cause if it is, I dont need to fall for it. If so, I will spend the extra $. Its for mp3 mainly, rarely movies. But I have a wicked set of speakers so I want the best sound, but for a good price.

http://www.futureshop.ca/catalog/pro...9&newdeptid=18

http://www.futureshop.ca/catalog/pro...9&newdeptid=18

http://www.futureshop.ca/catalog/pro...9&newdeptid=18