DisinfectedDuck, what you're going to hear from the majority of people on this forum that know music is to bypass all the "computer speakers" and go w/ a component stereo system, receiving input from your sound card. If you don't want to go that way, then a couple of brands of computer speakers to consider include
VideoLogic (a bit difficult to get in the US) and
Klipsch. Another favorite these days are the
Logitech Z series. The only model in that line to consider, IMO, is the Z560, and that's a 4.1 solution.
If you simply listen to music, and games are not a big factor, look at the Klipsch ProMedia 2.1's. I've had these speakers, driven by a SBlaster Live MP3, for approx. a year now, and I'm still very pleased w/ them. Know that the Klipsch have a
bright sound to them, due to the horn style tweeter. I'm going to be building a new system soon, and I have a Turtle Beach Santa Cruz sound card to put in it, and I'm anxious to hear how it sounds w/ the PM2.1's, as much that I've read says the TBSC has the best mp3 output.