Good Sound System Needed

I've been using my old Dell's Altec Lansing speakers for several years now, and the two little speaks and subwoofer have been doing pretty well. But now the left speaker is starting to crap out every once in a little while and I've got to kick the **** out of my subwoofer (it's where the two speakers connect ) to get it to go back on. So I think I've warranted a new sound system for my computer.

The question is, where do I start? I don't watch movies on my computer so I don't need 5.1 surround or anything like that, but I listen to music all the time and I need some speakers that put out a very clear, loud sound. I'd like a subwoofer but it's not needed as long as I can still get some serious bass. I don't want to spend much more than $100. I'm off to newegg!<!-- google_ad_section_end --><!-- / message -->