It is important to understand that paying a fine is an admission of guilt. While it may seem like paying the fine is not a bad option, you need to consider the consequences of having the speeding conviction on your driving record. A speeding conviction a result in points, and points often result in an increase in insurance premiums.
Fighting your ticket makes sense when you cannot afford to assume any more points on your record, or you do not want to accept higher insurance premiums. Fighting your ticket comes with a cost, though, and you should expect to pay attorney fees to represent and defend you at your hearing.