One amp I've used that had an almost frightening amount of housepower is the Perreaux 350A. This thing pumps some current! Spec'd at 350 per ch at 8 ohms, it actually delivers ~500 per side; at 4 ohms it truly doubles-down. So that's potentially 1000 watts per ch, & with 87db speaks you do need it. I've cranked it & cranked this amp some more with never any signs of petering out, until I feared for the life of my speakers. The SPL's kept increasing until it felt like something's gonna come apart. Musical yes; however I can't say about the matchup with your speakers since they aren't mentioned: what speakers do you actually have?