Jaw surgery is a large procedure, and you would definitely need to weigh the pros and cons first. One of the major reasons for having jaw surgery is to correct an abnormal bite. If you do not have any issues with your bite/teeth alignment, or other underlying jaw issues, there is no reason for jaw surgery. Jaw surgery really isn't done for just cosmetic reasons, and may not be covered by insurance if there are no real medical issues to prove why it is needed. As for your aesthetics goal, a genioplasty could give you the results you are looking for. This would bring your chin forward and down, creating more projection and length, resulting in a better balanced profile. It would also add definition to your jawline. You may also consider jawline contouring, depending on the front view you are looking for.