OK, back on topic (boo!)...
I replaced my Sylvania SilverStars with a pair of Phillips X-Treme Power bulbs. I wanted to install the X-Treme Power bulbs but couldn't get them in time so I went with the SilverStars (anything to improve the stock headlights for a night drive to the desert campground).
Here's a pic of the Phillips X-Treme Power bulbs (left) and the Sylvania SilverStars on the right. I noticed that the SilverStars had a bluish hue to them compared to the X-Tremes (not sure you can see this in the pic).