Which is better for 2 15's. Orion cobalt or audiobahn dub500?

I have 2 orion cobalts that are 300rms/600 peak for each speaker n im running a mtx 300rms/600 peak amp. so im only putting half power to each speaker. would 215 audiobahn dub 500 800rms/1600peak each sound better or is audiobahn dub a bad brand? i would be running a lanzar 1200 watt max amp to the audiobahns.