Dave - a word to the wise, find a good motorcycle accessories store that stocks a large selection of helmets and find the ones that will comfortably fit your head. Head sizes and shapes vary, and a double XX sized helmet in one brand may not even fit you at all (or be totally uncomfortable), whereas another manufacturer might fit and feel just fine. They vary like the wind.
Two likely candidates: the HJC helmet (try their flip helmet too) and one of the Nolan helmets (they also make a nice flip helmet). The other brands, while they look nice and have some great ratings, I couldn't even find one that was wearable without a lot of pain.
Good luck, maybe you will have a wider selection,
DaleC