Wait, if you have your lights on all the time, why not do the capacitor mod instead?
Ah true, but some (me included) like having them stay off by default and manually turn them on.
Guess it comes down to preference:
DRL Killer/Quad Beams mod: headlight off by default (no AHLs), running lights on, AND quad beams
capacitor mod: headlights on by default (keep AHLs), running lights on, NO quad beams
Im a sucker for quad beams, there are at least 3 ways I can think of doing them off the top of my head though and just as many DRL killers.