2 ohms will be just fine. not the best amp in the world but if it plays and you like the way it sounds then stick with it. most amps that say 1000 watts max power like the sony really means that its putting out 500 watts rms. i assume that amp is only stable at 2 ohms. if you want a real nice amp expect to pay 1 dollar per watt unless u find some crazy deal on ebay.