For an overcoat, camelhair might make a more formidable impression. For a topcoat, I'd go with cashmere. Either fiber is magnificent, in its own way.
btw: I can't help but think of the classic film, SUNSET BOULEVARD. In this movie, William Holden models a SPECTACULAR coat, with inverted pleats at the hip. I'm not quite sure what fabric the coat turned out to be, as his ladyfriend, played to overwrought perfection by Gloria Swanson, asked first for camelhair, after which a cunning salesman suggested that Mr. Holden . . . choose VICUNA, instead. 'So long as the lady's paying for it . . . why not take the vicuna?'