I couldn't agree more with what Andy writes:
I’d highly recommend that you redeem the time and systematically and thoughtfully listen to these MP3s. I have profited immensely from them. Carson's manner of speaking is just as articulate, thoughtful, and engaging as his publications. He exalts Christ by exegeting his words, tracing themes through the Bible’s salvation-historical storyline, addressing hot topics with clarity and nuance, and engaging and confronting bad theology as well as the culture.You can access them at Carson's TGC webpage. You can also browse most of them at his sermons page.