Replacing headlight bulbs 07 Ford Taurus SE?

I have a 07 Taurus SE and wanted to know what's the best/brightest of all headlight bulbs I can use without buying a conversion kit that won't cause me to blind people in front of me

The hid bulbs are brighter, but their legality is questionable. In my opinion Xenon and white halogen are much better because quality of their light is good and clear. Check out some bulbs:
http://www.automotiveempire.com/light-bulbs.html?p=1