Well, the thing about audio is that, peoples ear hear different things, and its not as concrete as lets say the frame rate of a video card, some people like big boomy bass (Logitechs), while I personally like tight clean sound on the bass (Klipsch 5.1 Ultra). All in all, it really just kind of comes down to what kind of audio you prefer, while if you want a really good speaker, you wouldn't get a PC Speaker set, you'd get those 600 dollar per speaker ones

thats just my thought anyway. Any way you look at it, completely 'PC Speaker Sets' are barely mid-range level anyway.