Shinzen Young is one of the best meditation teachers I have ever met. He is very intelligent and extremely knowledgeable about science, and he speaks in a way that someone who values scientific, logical and rational thinking would find extremely attractive. (Also, he speaks fluent Mandarin, so I like to say he speaks my language in more ways than one). His audiobook, the Science of Enlightenment, is the best description of enlightenment (with a small 'e') I have ever come across. I very highly recommend it. There are also many video clips of him on YouTube, I highly recommend them too. I was so impressed with him the very first time I met him in person, I asked him to be my teacher.
I had the honor of hosting Shinzen at Google twice, once for a public talk and once for a meditation session. I highly recommend them. Here are the YouTube videos.
Shinzen Young's talk at Google (YouTube link)
Meditation with Shinzen Young at Google (YouTube link)