Surrounds can be easily replaced if that's the only issue with the speakers. If the speaker cones are cracked or otherwise messed up you may be better off just buying new speakers. If you do, listen to as many as possible both above and below your price range to get a feel for what is out there. I would not get caught up in all the hype and BS of a particular brand i.e. kevlar drivers and golfball dimples on the ports. Buy what you like.