Ultimatum comes in second to my mind, headway is technically more advanced and more straight forward to me.
I have both, Headway and Ultimatum. I do find that I kinda stay in Ultimatum these days. it just seems so intuitive and easy. You can shape page templates to be anything you want in very little time.
I guess I’ll truly know which I like better when licenses come due. To be fair, I should go play with Headway again and see if there’s been updates..