Check and see where the headlights came from for your coach. That will help with your decision. On my Monaco coach the headlights came from a BMW 700 series automobile. These were made by Hella and are a known high quality brand of headlights. If at any time I would not be happy with the brightness, I would first look to make sure they are properly aimed, then I would insure that they are getting full voltage, and lastly I would change the bulb. I cannot imagine ever needing brighter headlights than were designed for a highway cruiser on the Autobahn.
It is usually not too difficult to find out where your specific headlight assembly is from. Find that and it may tell you what you need to do to improve your night time vision.