If you have enough residual hearing that you are happy with the way hearing aids work for you than you want to think long and hard before going for an implant. I decided to go for an implant because I was frustrated with hearing aids and I really had nothing to lose in the ear that was implanted.
If your hearing loss is severe to profound you can always go for a CI evaluation. Even if you don't qualify at least you will have an idea of how hearing aids are helping you. If you do qualify you can either go for it or wait. The choice is yours. Just keep in mind that CIs are not perfect. I certainly don't have the hearing the "Bionic Woman " was supposed to have but I am very happy.