The new Sweet Rocker has a removable visor and may be just what you are looking for. Great full coverage, particularly for the ears and back of head and uses over a half inch of EPP foam, which is currently the best multi-impact waterproof foam available. Shell is kevlar/thermoplastic composite and is very strong. I have taken a few very hard shots and been happy that I was wearing this helmet. May be a few helmets out there that are just a good, but I am not sure if there are any better.
Kinda pricey but your head is worth it.
"It's All Good"