I am using the onboard sound of the NF7-S2 with new logitech z5300 speakers, but I am not that impressed with the sound. It is very bassy(which is OK, but the highs are tinny and the rear speakers dont put out very much noise. Would getting into a good sound card fix this and crisp the sounds up? Would I really be able to tell the difference between the onboard sound vs. a decent sound card? Or would it be better to spend the extra $100 on a better speaker system? I just got the speakers from new egg for about $139.