Looking for a nice Autoflower

Hi, I am looking for a nice low smell autoflower to cross with my northern lights to give it the autoflowering ability. I am growing this in a PC case so it cant be a huge 20ft natural plant. I am hoping for a decent potency with low odor. I dont really want lowryder because their so small and I am going to mix male pollen with a female northern lights plant to get an autoflowering northern lights to grow outside. And i was also wondering if its possible to buy like a male seed instead of a female seed instead of buying 10 seeds hoping one was male.