I'm really enjoying listening to the Renewing Your Mind podcast, that is mostly R.C. Sproul sermons.  I've got his book, "Hard Sayings" in my Amazon cart to buy soon.  He really speaks God's truth and doesn't shy away from the hard sayings like so many pastors. 

 I read a few books from R.C. I don't agree with everything he says but I believe he goes wherever the word takes him.