Find out the of your baby or not?

If I was in your shoes, I think I would not find out. I didn't really want to find out with this pregnancy, but my fiance really wanted to. We already have a 4 year old son, and just found out we are expecting a little girl. This is helpful to us as we want to be able to prepare the nursery. I think that since this is your final child, and you already have at least one of each gender, then you should keep it a surprise. There aren't many surprises in life, but this is one that you won't regret.