Not worth it.
These bulbs cost 20-40 dollars and their live span is short, you're better off getting a HID set that will last IMO... I've seen my reviews where they say these bulbs last a very short time.
According to Sylvania: "Since our SilverStar(r) ULTRA headlights are up to 50% brighter than standard halogen, they will have a shorter life span when compared to our other products. Part number 9005SU will last for approximately 125 hours of "on time", 200 hours for part 9006SU."
A guy also said "Compared to the regular SilverStar, the Silverstar ULTRA headlights were supposed to "last up to 30% longer". I have used the Silverstar in the past and decided to give the Ultra a try. They only lasted 6 months."
It's up to you but, it just seems like a waste of money to me...
Good luck