Agreed with Spyder - look at both Olympic Ferro and Flemmingh. Both were bred to be top jumping horses and in fact turned out to become dressage superstars.
Very true about the Ferro line, they are a highly sensitive, intelligent and generally difficult horse. Definitely not for the amateur - but I absolutely love them. Have a mare by him, perhaps that I will breed one day to Toto once we see what he produces. I can't justify spending that much on such a big chance - much like the Hickstead stud fee.
*Riding is not a sport, it is a passion. If you do not share the passion, you do not know the sport, and therefore are wasting your time*