Find the correct sound card for your needs. Be it PCI or external the following host of sound cards should meet your needs. Additionally, the right sound card should work with a mixer board be it for broadcasting or live production.
My personal favorite PCI soundcard or even internal chip soundcard has been Creative Labs sound blaster cards. These cards have been rock steady since the 1990s. In my experience operating Good Rock Radio I have found Sound Blasters to have the most crisp and bassey sound. Never had any problem getting them to work with Behringer or radio shack mixer boards.