Be careful, some of the audiophiles on MR will blast you for even asking this question.
I appreciate high-end audio equipment but I'm not insane. I only like to recommend equipment I've actually heard/used so this is the best I can do:
Altec Lansing VS41213 - I bought a pair of these for my ex-gf as a Christmas gift. They are pretty good for the money. Basically, I went to Best Buy, Ciricuit City, etc and listened to every system they had to find which one I believe sounded the best. Then I went and bought that system from newegg.com. I couldn't find this item on newegg today so I linked buy.com ($73), another online retailer I have had good experiences with. This might not be the exact same model as the ones I've used (mine were black) but it's really close, maybe this year's model is slightly different. The bass was boomy, as it is on all of the cheaper 2.1 systems, but the mids and highs were good for the money and if you turn the bass down a few notches it all blends fairly well.
If you are willing to spend some more, not TOO much more, but enough, then you can get what I believe are the best multimedia/computer speakers around for the money.
Swans M-200s - These run $175 and just rock! They are sized more like traditional monitor/bookshelf speakers and do not come with a sub but the imaging and sound quality are simply amazing. I was blown away. I own an Aego2 system by Acoustic Energy that cost me $400 and the M-200's blow them away, IMO. I know it is nearly double what you were looking to pay but if you can afford it they are a solid investment, great speakers!