The stock housings are crap, and light will spread all over the place, probably blinding oncoming traffic. Do yourself a favor, and save for Trucklites, JW Speaker, or KC led replacements.
Truck lites are worth the money. The light pattern isn't annoying to oncoming traffic either, but you will feel like you have the sun lighting the road in front of you.
if you mean 6500k as in color temperature, thats a really blue color. I would recommend something around 5000k. The human eye cannot focus well with blue light.