Sound Blaster Live Usb Thinking Of Buying An External Soundcard?

Thinking of buying an external soundcard? - sound blaster live usb

Hello! At the moment I have: Realtek HD (on board) and I wonder if I bought these:
Sound Blaster ® Live! 24-bit External
http://www.dealtime.com/xPO-USB-SOUND-BLASTER-LIVE-24BIT-EXTERNAL-SOUND-CARD-WITH-CMSS

my music sound much better? (I have decent headphones: Sennheiser HD485)

Thank you!