Yeah, I've been getting emails about the ADA4870, and it looks
really nice. I can think of so many things I could use it for...
Was going to suggest it, but then noticed the supply range is 10V off. Any chance you could relax that requirement a bit?
Otherwise - look at the output stages of old analog function generators. They often had high bandwidth and high voltage (had to drive quite a bit into 50R for general-purpose use); typically made from discretes. Alternatively there are tons of ways of bootstrapping op amps to higher voltage use.