Try John Hick's "The Metaphor of God Incarnate' and Baum's 'Man Becoming' (start with chapters II) and John Macquarie's 'In Search of Deity.' Plus, as mentioned Fredriksen, the biblical scholar is a great writer and scholar.
Ehrman has a website and posts very, very often and answers questions. Also in on Youtube and his site for lectures and debates (he is quirky, nerdy and fearless). I like Spong and Borg but I believe that both have preconceived takes on Jesus and Christianity that influences what they interpret. I have not read Enns.