For a 1989 420 SEL with Euro lights, the main headlight bulb is a 9003 or H4 bulb. What is the best replacement bulb, in the 60/55 watt model?

I have been running a German made Bilux but one just burnt out. They only lasted about 2 years. I had a spare 9003 XV, Osram, made in Germany. Now I need a new spare set. I prefer to stay with the standard 60/55 watt bulbs.

Any recommendations?

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1989 420 SEL