Re: Replacing Low Beam...
Just be aware that 8000k lights will look wicked cool but their light output will be less. As the color temperature goes up, the light output goes down. Stick to something that's close to natural sunlight: 4,700k - 6,000k for great visibility at night. Buy a set of 8,000k bulbs for the fog lights instead.
Also, I wouldn't recommend getting HID for the high beams. HID lamps take about a minute to "warm up" and come to full brightness so they're not very good for the short, intermittent use that the high beams normally get. Grab a set of PIAA Ultra White or Sylvania SilverStar lamps instead. They will look yellowish compared to the HID low beams, but not as yellow as the stock halogen.