Those are some nice looking speakers. They're just a little shy of 90dB efficient, so they aren't too power hungry. The Stereophile review available on Pioneer's site confirms this - the reviewer says that they can play loud without a huge amp, although the amp needs to be comfortable operating at 4 ohms (as all of Outlaw's amps are). You could probably drive them well with a Model 7125, although I'd be tempted to go with a Model 7500 or 7700 (depending on whether the room would support a 7.1 setup or not).