The words super duper (first of all, dupper shouldn't be used in context with anything, ever) shouldn't be used in context with "less than $100", it doesn't work, at all. I paid $350 for my 5.1's (Klipsch), and I don't claim to have a "super dupper" computer.
Secondly, you'd be damn hard pressed to get awesome 2.1's for under $100. Still "jsut want the best sound or match to the audigy2"?, then you should be investing in some serious home theater equipment running you well above the $500 price tag.
Sorry but that was sad.....