Sue, I'd go with Hyde's Hall. It's a beautiful white that tops out at about the same height as the Hot Cocoa, has red anthers to reflect the color of the Hot Cocoa, and is pruning group 2. Hot Cocoa doesn't really require pruning to produce a fabulous bloom, so I am very light in the treatment with mine. I would think you probably do the same. So, a pruning group 2 would work very well, giving you a longer, lusher display.
