I want to upgrade my five-year-old Creative Inspire 2.1 2500. The speaker's quite ok but the volume control has gone kaput, so i have to keep fiddling with it, which is very irritating. 
I need something with more clarity and bass, cause I listen to a lot of hard rock. Please suggest something.
Soundcard's the integrated 5.1 channel with Biostar TA785GE-128M motherboard. Should I get a dedicated soundcard too? Or will a 5.1 set-up work okay with this?
Budget's flexible, but tentatively around 5k
Pls advice. Thanks

I need something with more clarity and bass, cause I listen to a lot of hard rock. Please suggest something.
Soundcard's the integrated 5.1 channel with Biostar TA785GE-128M motherboard. Should I get a dedicated soundcard too? Or will a 5.1 set-up work okay with this?
Budget's flexible, but tentatively around 5k
Pls advice. Thanks