I just got turned on to a great internet music station. Now that I have something to listen to, my bottom of the line H/K speakers do not cut it. Please give some suggestions on computer speaker upgrades, and I plead ignorance- should I get new sound card too? If so, which one? I don't know if this matters: I have a DSL line for connectivity. I would prefer the 'bang for the buck' end of things- the Paradigm/PSB version of computer speakers. Thanks very much.