Yes , the teeth remain at its best when gone with metal free caps for both the reasons look and function.
Next Steps
please get your existing caps removed by the dentist and get a fresh xray to decide on the filling/ RCT with an all ceramic cap
Health Tips
Also, while it comes to treatment for a tooth, its is very important to learn hygiene
aids that will help in maintaining the longitivity of the prosthesis. So get your self aquainted with that too from your dentist.