I want to remove a gold from my tooth.What are my replacement options for long term? (photo)

When I was 18, I got a gold on my right front tooth and now that I am older (39) and my profession is talking to people, I don't find it to be very professional for me. I would like to have it removed. What would be the best fit for me in the place of the gold; to look natural and professional? What are my options?