Go for the crays, but make sure you have a tank for them and them alone if you want breeding in your main tank. Forget fry, they'll demolish the eggs.
While I would love to see a tank of yours for discuss, you should make sure you can care for them first.
Yeah, that is what I am thinking, that is why I'm going to wait for at least 5 months so the Co2 and plants get running, and the tank is stable enough for discus, I may attempt discus and corys and schoolers at first and maybe add a school of angels?