Another benefit of doing a headlight harness is not melting your headlight switch all the time and then having light issues. Having battery power straight to the relays and then using the headlight switch as exactly that, a switch, to turn on the relays, you eliminate running power through the switch and melting it.
X2 on windshield cleaning, makes a world of difference.
I also noticed light output improvement from just the harness.
I love the look of the quad headlights with the marker lights in the grille, my favorite style other than 73-80 front clips.
And with the quad healights I plan on running some led high beams and some newer style low beams, goin for a 5000k color, basically white light