What's wrong with upgrading to a HID kit?! :P
Anyways I've heard many different stories about Philips Diamond Vision 5000K vs Crystal Vision 4300K, which include the longevity of the bulbs. Diamond Vision is definitely whiter than Crystal Vision, but have the tendency to die in about a year? Not too sure. Diamond Vision also doesn't project light as far as Crystal Vision, as seen here:
http://img130.imageshack.us/img130/5...headlights.png
Snippet taken from
http://www.invisionsales.com/philips/bulbs.html
Anyways you want to buy the Diamond Vision bulbs and the price of that eBay item raises, try this place:
http://www.powerbulbs.com/product_detail.asp?prod=152
You get free Parkers :P. I've ordered from that site for my friend before, takes roughly a week to arrive in AUS.