I've recently bought some Autobulbs from www.powerbulbs.com.
They're Philips Vision Plus, and they were featured in Auto Express Magazine, where they claimed they gave up to 50% more light. I bought some for a reasonable $37 per pair with Free Shipping, and the results are very impressive. I would definately recommend them to every motorist, not only for visual appeal but for safety as well! Well worth the money!