Expresscard Audio Is This Worth Upgrading The Sound Card?

Is this worth upgrading the sound card? - expresscard audio

I want a Dell XPS1530 for college next year and wondered if it's worth moving to the "ExpressCard Sound Blaster ® X-Fi Xtreme Audio Sound Card" as the "Integrated Sound Blaster Audigy HD Software Edition is opposed to" the laptop with? What is the difference in sound? Thanks in advance!