How many of each sex?

I currently have a male and female first year domestic geese, and they are so wonderful I plan to get more. I have a pond and a coop for nights. Advice needed about how many of each sex should I get? Do I get pairs, say 4 males, 4 females? Does it matter that much? What if they pair up and one dies? How do they behave?

I will probably be getting assorted hatchery choice from Meyer Hatchery. I can choose the number per sex.

Thanks for your help!!