Your best bet really is to go to a musical equipment store and listen to some in real life so you can make a judgement for yourself about the sound quality. Make up a CD with a variety of music, not just chip tunes or electronic music, then play that on a bunch of different speakers. If you just buy a set online or something based on a recommendation without having listened to them you have no way of knowing if you'll actually like them.
Also consider the size of the room the speakers will be in when you're buying them, if you'll be using them in a small room like your bed room you'll want smaller speakers, if they're too big the bass will just overpower everything when you turn them up to a reasonable level.
I will say, however, that Behringer make some very colored monitors, in other words the bass and treble are hyped to make them sound good, so beware if you're considering getting them.