I'm surprised that you find the Plinius to be clipping. It's known to be a very gutsy amp. What Proac speakers are you using with it? Maybe the limitation lies there. If you want very high volumes, perhaps look into different types of speakers (such as horns).
If it's just a higher-powered amp you seek on a budget, I'd look into the old Carver Lightspeed amps.
Michael
If it's just a higher-powered amp you seek on a budget, I'd look into the old Carver Lightspeed amps.
Michael