logitech is known for their overpowered bass so there's really no alternative to brands unless you go with non-pc speakers. with that being said, try to get it replaced under warranty. if you're willing to go 5.1, z-5500s would be an improvement but if you cant afford that, go for the 5300e although it wouldnt be as boomy.
if you're willing to trade off some bass for some midrange, check out the klipsch promedia 2.1/5.1.







