I bought a set of bars today that were 780mm wide. I held them in my hands and pretended I was on my bike, like you do. A definitive test given the circumstances.
I couldn't imagine riding with bars that wide and promptly had 15mm of stupid lopped off each side. I stuck them on the bike impressed and the kids up the road with a display of nice stunts mister. They still feel weird a bit - despite me being a lanky, long armed git and owner of a similarly sized bar on another bike. I maybe should have went with the higher rise and maybe I shouldn't have asked the shop mechanic to mutilate them.
Still, they almost match the colour of one of my fork legs (but are too bloody wide for the camera)