if you want a system that gives you erections with house music, a subwoofer is a must though. It adds so much 'umph' to the sound its amazing! Otherwise you're going to need really big speakers, might as well get a subwoofer.
2nd hand JBL horns would work too, and they 4xxx range of speakers can be had for all kinds of prices.
Technics SL1210mk2s and a Freevox DJ CLUB