Back to the serious stuff.
If either of you do decide to adopt, I suggest doing an overseas adoption. Not sure how the costs compare but I just don't trust domestic adoption. There are too many stories of mothers demanding their kids back later on.
My wifes younger brother was adopted from Russia. It ended up being a hassle, but they didn't regret it in the slightest.
Partially second this. Have friends that have adopted. Open adoptions are a potential mess, cut ties. Sounds mean, but long run stabilility is best with this.