Congratulations!
Our boys are Luke and Drew. Had we had another, we would have named him after my brother Jack. I also liked Rex when I was pregnant with Drew, but DH vetoed that one. I tend to like one syllable names for boys - they seem more masculine to me. Of course, that would also depend on the baby's last name, whether its one or two syllable. Obviously a one syllable last name would probably sound better with a two syllable first name.