What will sound better? aftermarket head unit to aftermarket speakers runnng off the head unts internal amp at 50 watts X 4

or aftermarket head unit running threw the rear and front RCA pre outputs with a special harness from Metra Model: GMOS-04 and bypassing the aftermarket head units internal amp and just using the factory monsoon amp to power the factory monsoon speakers? whats will sound better and louder?

The third one. Good aftermarket head unit hooked up to a good aftermarket amp hooked up to good aftermarket speakers. Or the first one.

I thought this was urgent. But ya what Lanman said.

get a new HU and a new 4 ch amp and youll be good to go like a crunch wrap supreme......best sounds/taste possible