I run the regular Silverstars. Was thinking about upgrading to Ultras as I needed a new low beam bulb, but just bought a replacement. $21.99 at Advance for one bulb about killed me.
The filament design used to throw a "brighter" light means the bulbs do not last a long time compared to normal halogen bulbs. If you can handle replacing them frequently, try the Ultras or one of their competitors (PIAA, Hella, GE, etc)