Sound card for a laptop?

[Powerslave]

I'm planning on purchasing the Creative Audigy 2 ZS Notebook external soundcard for my laptop mainly for listening to music. I have a 2.1 setup and am not planning to upgrade to a surround set anytime soon. Do you think this card will be necessary at all? Is the improvement in quality that significant? Cause I'm actually pretty happy with my Logitech Z-2300's directly hooked up to my laptop through the headphones-in output, but I want to be a complete audiophile from now on. Help me out please, I don't want to end up with something I maybe don't really need.

The soundcard at hand:
http://us.creative.com/products/product.asp?category=1&subcategory=205&product=10769

[Tauntaun]

If I knew what to say I would, but for now, I'll just dance.   

[Powerslave]

[Vizzys]

DANCING IN MY MIND

[Tauntaun]

Dude, Viz, you up on the manga?  It bout to get jiggy wit it. 

[Powerslave]

you guys suck

[Tauntaun]

Seems like it'd be good and for $99, a pretty good deal. 

[Powerslave]

best advice ever