I would also recommend tank raised discus vs wild discus to start out with. Tank raised discus tend to be more hardy then their wild counterparts, and less timid. On the other hand, tank raised discus also have a tendency to breed when the conditions are right versus a wild strain fish that is near impossible to get to breed in captivity unless certain conditions are met, and there is no guarantee even then they will be prolific. If you get discus and they do decide to breed, just take out the eggs. However, as with any fish that is a breeding pair, they will continue to do this "natural" thing for as long as you continue to keep them together. Good luck.