Hmmm, The S550 bass is a bit too boomy(for me). I prefer punchy bass (personal taste)... Anyway, Mids are ok and need a bit of EQ adjustment for treble. Overall it makes the best 5.1 setup currently (for pc I mean) nothing beats it now. But if you prefer punchy bass and more treble, go for Logi's z5500(*note less Mids). If U r a music head, go for S730. You won't regret. Anyway, U can audit those at Viewnet Hypermarket. They demo them there. Buy according to your own taste, opinion might not suits U ^^ anyway, happy speaker-ing!!!