The Cambium models at least look a bit more like a 'normal' road saddleThe words Brooks and attractive in one sentence ? Never heard that before.
Brooks should be on old bone shakers, and not a Cube. Get the Spoon. They are great saddles.
I've had various Spoons and they were all OK on my MTBs.I have a Cambium C17 on my Lynskey and really like it!