We're at 2 with the option of 3 camp.
We will reassess our mentality after LO#2 in the future, how I feel (emotionally/phyiscally/etc.) after the next LO#2, and also how we will transition to a family of 4 in the future.
Financially, family support, age-wise, we feel secure to have more than two children, so DH says that the driving force will be our life/work/family balance + my feelings on being two and through once we experience it!