I just installed these today. They seem to be a bit brighter and they have a lifetime warranty. Was recommended by a fella on the board here.
$30.00 USD for 2 bulbs
http://xenonexpert.com/xtechalogenbulbs.html
"Xtec HIDMatch™ halogen bulbs that match your HID are made to remove that "yellow" color stock bulbs have. They are rated at 4000K giving you a nice white color that can match your HID bulbs or even your other Xtec halogen bulbs.
These bulbs carry the same lifetime warranty the Xtec products are known for. That's right. A bulb burns in 3 months? We send you another one for free.....Nobody does that."