Just a quick blip...
I added the brightest headlight bulbs you can get a couple days ago: 4500k 55w HID's. Super pleased with the output. The projector housings work great with them, and the low beam cutoff is still as sharp as ever (so no offending oncoming traffic). Clicking into high beam is just awesome. They (shining on the back wall) light up my entire garage more than my florescent light fixtures.
For $60 for the pair, with lifetime warranties, I'd highly recommend the setup to anyone, especially if you're considering auxiliary lighting... try these first.
Most brands will be comparable, but I went with DDM Tuning
. No affiliation, but that's what I have on my WRR, and had in the fog lights of my last bike. My only complaint is they ship direct from China and it took a good 2 weeks.