If you do, you may find that you can't move it into your next system, because ISA slots are becoming extinct. Of course, PCI also gives you a lower processor utilization than ISA, so you may get a few extra frames per second if you're playing 3D games. That is good. For the best sound, you should get a name brand sound card, such as Creative Labs, Diamond Multimedia or Turtle Beach. The more voices you have, the better.
More voices allow more sounds to play simultaneously, for a richer sound experience.
Sound technology is a complex thing, and changes quickly, much like 3D graphics. Read some reviews, and make an educated decision. All rights reserved.