Yes, that's my impression too. So with my limited budget of about $250 for an amp, I'm looking at a Sundown SFB-1000D, the Alpine in this topic, and a D'Amore E750.1. The JL Slash series as well as the Rockfords are over budget. Any other mono amps at 1 or 4 ohms with 500rms I missed? The...