I just took a set of the Philips Visionplus out of my bike and put Silverstars in. The Silverstars are immediately and noticably better. To be fair the Philips ones were fairly old, do bulbs lose efficiency? They looked in good nick...
Free to a good home, for the price of postage.
I'm still thinking I might go up to PIAAs. In fact, at the back of my brain is a little voice saying "Retrofitted Audi HIDs" but I'm resisting
