There probably are not many other people I would like to hear speak more than these three men, Don Carson, Tim Keller, and John Piper. Over at the Gospel Coalition website they have a number of short videos from a conversation the three of them had on various issues, all well worth viewing.
I particularly benefited from the discussion of gospel-centered and God-centered thinking. I hope that you benefit from it and are able to view other parts of this conversation.
I Commend Joy! 