I agree with Fear about the sound cards. They make good sound cards. But I wouldn't go as far as "begging" due to user experience. I could beg you to get the Z-5500 because I have had a very excellent user experience with it. But I know that the decision is yours to make so I don't beg.
Creative does have some excellent speakers. From what I have heard at least. I think its pretty safe to say that logitech and creative are the best companies out there for speakers.
Fear: I believe you have a sound card from creative don't you? or am I thinking of someone else? What did you get? Pro's and Con's?
-SnowFire