I purchased some for my 07 silverado from carhidkits.com after my buddy had recommended them to me and have fairly satisfied with them. I ordered the 6000K kit for $80 and it came with a ballast for each light and all harnesses necessary for installation. They are a good white color and not that trashy blue stuff. I only got the low beam kit, but they sell kits for your high beams and fogs if you want them to all match in color. Be careful to order only 1 kit as it has both bulbs in it. (learned that the hard way). Been meaning to aim my lights down as i get brighted by everyone when i'm on 2 lane highways.
Sorry for the giant pic, still learning all this photobucket stuff