I have an Ovation & love it- but I don't mind the adjustment dial. It's held up well, and is light weight. I have the black model & it's breathable, doesn't get ridiculously hot. It's honestly the best helmet I've had. Hope that helps. (:
It depends, the best would be to try some on. I personally like having a dial but I have a IRH model. I can't really comment on the helmet you posted as I don't know much about ovation helmets, but :( I have heard that the tipperary sportage is very comfortable and fits relatively well almost everyone.