I think she is little on the masculine side as Knabe pointed out. BUT, I would think about pelvic measurements on her. That would be first and foremost. With her structure and visual appearance it just indicates more masculine build. she may be fine and have plenty of room to calve. if you find that to be the case, there are alot of calving ease choices besides straight angus. There are good Shorthorn, Maine, simmi and Galloway choices.
As far as her flank, that is a tough one. I think structurally you have done about all you can do with feeding.