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Ive used silverstars and been happy with them. they do seem brighter/whiter.
a cheaper alternative would be the sylvania HV series (high visibility). same filiment as a regular bulb but slightly different placement to get the light up and out (ditch side) a little more ... must less costly than the silverstars, but not as purdy.
If you don't want to go with H.I.D.'s i would recmond what i use as well it Piaa's lights they are not cheap but are a fatnastic light and as far as i think worth the money.