My old Cambridge Soundworks DTT2500 5.1 system is crapping out.  I have a 5 channel sound card, a soundblaster audigy.  I wasnt planning to buy a new sound card, just was looking for a newer system to listen on.  I dont want anything cheap, nor do I want to spend 500 dollars either.  Just kind of a nice 5.1 channel system.  Any ideas?