I like longer camber boards also and tried to go up to a log also. It ended up being so exhausting to ride that I couldn't last a full day. I'm a few pounds lighter than you, but would say that if you have not tried a 200, I would want to give it a long try before committing. If you have demoed a 200, I would guess that you already know the answer to your question.
Cheers, and start a new board porn thread for this season when you get your new toy.