I have Philips all-weather bulbs installed on my MKIV as fog lights. They are really beautiful bulbs. Good tone, bright, and most importantly they have been on the car since 2002. I never had to replaced them once and i turn them on all the time.
www.powerbulbs.com has pretty good deals on on variety of bulbs. I will be buying the same all-weather bulbs from philips for my MKV when my car arrives in a month. Here are a couple pics of my MKIV with the fogs on. The pics don't show it too well, but you can still see the differece compared to the OEM HIDs.