The problem with putting 9005'* into the GXP is going to be a serious lack out light output. In any Bonneville that doesn't use the HIR-1, when the high beams are on, so are the low beams. The GXP turns off the low beam bulbs when the highs are on. The 9005 just doesn't produce adequate light by itself to be a good option in this application.
Personally, I like the look of cleared headlights but if you remove those the car will no longer meet Federal Motor Vehicle Safety Standards. Although not common, you can be ticketed for that and your car is less visible at night from the side.
Similarly, I personally feel that disabling DRL'* is foolish, a bad idea and in poor judgement. Stats have shown they reduce collisions and improve safety.
StingRay Bike w/cards in the spokes, Weeeeeee!