I bought these some time ago for my PC, and they are great.
They sound better than my 10 year old pioneer bookshelf system which I paid big dollars for in the day. Thats using the AC'97 onboard sound from the PC too.
The volume/bass mini controller that comes with it is very practical.
If you think they lack volume, check your windows and media player volume settings. Adjusted correctly, these babies can scream quite loud I've found... performance & clarity wise for the price, I got more than I expected!.
An excellent package IMO!!!