I blew my gold on incubators when i heared the eggs would be more likely to have new pokemon.
That sucks, now the same stuff is cheaper. I will invest some real money to stack up on incubators.
I would choose the small box. 50 gold for 2 incense is not good, its the normal price. So you get twice the stuff for twice the price compared to the small box, but also you pay 50 gold for 2 incense. Not good.