While I would probably go for the dream kitty if I were you, there is a downside to the world of purebred animals. Purebreds are often as far from the basic/natural/nature's intended version of the animal as they can be, which results in health problems. Also, in the quest for the most perfect and succesful animal, some breeders will allow inbreeding to occur. I'm not sure how things are in the cat world, but I know that in the dog and rabbit worlds, you are often better off with a mixed breed. When you go with a purebred, you have to be willing to deal with the breed's problems. For example, with rabbits, certain breeds are prone to specific health problems. Lops are prone to ear infections/ear mites, Flemish Giants and other large breeds are prone to bone and joint problems, rabbits with "smushy" faces are prone to respiratory problems, etc.
So basically, you should find out if the breed you are looking at is known for any health or behavioral problems.