For you guys with upgraded headlights, what did you use and are you happy?

I ask because during our annual Club cruise to Colorado a couple of weeks ago, several of us noticed that Weendoggy's (Glenn) headlights were much brighter and effective than the sealed beam units that we were running.

Brighter headlights would be a good thing for mountain road driving in the dark.

Recommendations welcome for parts and vendors I/we can use to upgrade our lighting.

Thanks.