i need some advice for good speakers that you can connect to a laptop by 3.5mm jack plug or something..

my own system is build out of a stereo tower hooked to my computer and a extra amp for my subwoofers so i dont know what good laptop speakers are..

they need to have some good bass and treble and good quality

price is not really an issue as long as the quallity is good

i will apoligize for my bad inglish its not my language

hope any one can help me