Definitely go with an LED setup. Back in the day (1978 or so) when quartz halogen headlights came out, I popped one into the headlight bucket of my '75 CB400F. The improvement in night time visibility was incredible. And I quickly learned about the difference between voltage output from the alternator (sufficient), and current output (not enough to feed the headlight and keep the battery charged). LEDs have the wonderful advantage of high output with relatively miniscule current draw, something that was science fiction back when these bikes were built.