I presume it would be best to use identical amps? If so which type and how much wattage? For onstage but loud enough for an audience on a dancefloor to hear their actual stereo mix over a PA playing blasting House music. Size is an issue; I can't really use two massive cabinets (too heavy, too big, might fall over and crush an audience member, heh heh). It would be nice to have two smallish but powerful units, one on each side of the PA. I might also run another mix into the PA for the sound guy to run into the monitors and the PA mix.