Dude, I really don't know much about speakers... But I can tell you, I've owned these:
Dell A525 Zylux MultiMedia Speaker System Ships Free!!***** 041268144365 | eBay
For around 5 years, and the sound better than my 7.1 Sony Surround Sound Home Theater, at least the Bass is way richer on them... Provided you place them in sort of an small environment... They are old, but really cheap and durable, the only con I have for them is the Volume control wheel, it sucks and its unusable (in my case...) either way you can probably pick them up for under $30 US on ebay (worth a try maybe? xD)