If you want good sound, step away from computer speakers and hook your computer up to a decent sound rig. Doesn't have to be more than about 100 dollars and it will kick the ass of any set of PC speakers you put up against it.
But I kind of get the idea you just want it to be loud and have ****loads of bass.
Well then you can pretty much buy anything crappy.
The reason Altec is pretty good is because it's balanced
.