gw- just read your post. See my reply to this post:
I can recommend the Oasis tandem single handed once enough ballast is added so that the entire hull is in the water.
I really enjoy sailing it. With it's length and width I'm sure it could cope with a bigger sail. I am working on a furling system for it that works quickly.
I think if Hobie offered a proper furling mast with bigger sail options ( like the different flipper types) they would sell heaps!