The Pioneer SX1250 is conservatively rated at 160 watts RMS per channel at 0.1% THD. That's a lot of very clean, low distortion power, and should easily drive any of the suggested prosound speakers, which are quite efficient, to ear-endangering volume. Please be cautious. I'm not kidding when I say that ear damage in the form of tinnitus can drive you near insane. I've had constant ringing in my ears since I was eighteen years old - 46 years of that stuff with not
one moment of relief. And my audiologist chalked all of it up to loud music while I played drums in rock and roll bands.
So, enjoy your loud metal music (who doesn't?

), but please know when to back off the volume controls. If you experience
any ear ringing after listening, you are playing dangerously loud.
Preaching over. Now back to finding you some appropriate speakers. About how much do you want to spend?
GeeDeeEmm