imho, 2.1 PC speakers to consider;
Logitech z623(THX certified but no tweeter)
Speaker System Z623
Corsair SP2500(worth the money but needs a lot of space for the bass) leaning towards gaming although still quite good for music
Swans m50w(pretty good all rounded speakers, really worth the money. It is however made in china but so far its one of the best looking and great sounding speakers)
Klipsch Promedia 2.1(worth considering but I heard that the newer ones are not as good as the older versions)
swans m50w, promedia and corsair sp2500 is about the same price. the z623 is abit cheaper
also note that new speakers have a 'break-in' period. So probably they sound weird during the first 2 weeks or more. Your ears need to adjust, speaker loosen up...etc