The only way to go is factory engraving. Unless you never plan to sell, do NOT include your name or other specific identifying information. That is only interesting IF you are really famous, and then it only enhances value after you are dead, but only IF you were really famous!

Just go with a tastful scroll and get at least 2/3 coverage. Do NOT use rare metals for inlay if you plan to shoot it. In my opinion, it is fine to shoot a factory engraved gun. After all, you go to the trouble to have it built - you might as well enjoy it. Certainly General Patton carried and used his engraved Model P without regard for what effect it might have on its value later.