I'd go for the lower wattage bulbs, the brighter ones would be serious overkill. I have always found the standard lights to be pretty good once set up properly. I've had 3 Fazers and all needed the headlamps adjusted, i think they are set up at the shop without a rider but as soon as anyone sits on the bike the headlight aim is way too high especially with the soft rear spring.
Spend a bit of time setting up the aim left and right as well as up and down and you might find they are bright enough.
Jim.
