Welcome to the board, Emmylou, and congrats on your pregnancy!
DH and I have 15-yr-old twin boys, and we didn't have Internet access when I was pg, so our thoughts on circumcision were strictly gut feelings and common sense. As we discussed it (keeping in mind that DH and all the men we knew [as far as we knew] were circumcised), we had the following thoughts:
1. That's GOT to HURT! Obviously cutting off part of a boy's most sensitive body part would be uncomfortable at the very least - brutally painful at the worst. We didn't want to do anything to cause unnecessary pain to our precious babies.
2. If it ain't broke, don't fix it. It didn't make sense to us to sign our babies up for operations if they didn't really NEED them.
3. Boys are born with a foreskin; it must be there for a reason. Even though we had no idea what the foreskin did at the time, we figured there had to be SOME purpose, so it was better left alone.
4. DH was not the least concerned about his son's penises "matching" his. Later I started telling people that if a guy wanted his penis to match his son's, he should shave his pubic hair and pack ice in his shorts.
We have not regretted that decision for a millisecond. When our boys first learned about circumcision, at age 8, they were horrified - they couldn't imagine NOT having a foreskin, and they were appalled to learn that parents signed their newborns up for such a fate. As they've gotten older (in high school now), they are even more convinced that infant circumcision is a cruel and terrible thing to do.
It sounds like your DH will be easy to convince. Good luck!