coreDNS versus ExternalDNS for Kubernetes service discovery? dont know which one to pick.

I'm setting up a new Kubernetes cluster and trying to figure out how to make services available externally. CoreDNS works fine for finding things inside the cluster, but for outside access, I'm not sure what to do. Should I just use CoreDNS with its plugins, or is ExternalDNS the way to go for managing DNS records with my external provider? What has worked for you?