Chuck - when it comes to the means of final closure, it may make a difference if you make your preference known before your surgery. When I discussed things up front with my surgeon, he indicated that their OR usually used staples for external closure. I asked about the "super-glue" and he said that he would use that if possible.
I guess he heard me clearly. I have about a 4-inch scar that is nearly invisible, even when I am sun-tanned. He even ran it on a slight angle so that I can wear a sport shirt with the top button or two open and the scar doesn't show.
I do, however, have stainless steel wire tied through my sternum. I've had no problems with it - even going through airport security. The pacemaker, on the other hand, always sets them off.
It pays to make your desires known. The worst thing they can do is not do what you wanted, but whatever they do, it will work.