Sam Harris vs Reza Aslan
Sam Harris comes off very strong in his books, and theists take alarm at the tone in his written word. I think you will see that in this live debate, Harris is composed, well-spoken, respectful to his fellow participants, and all around enjoyable. I daresay that Harris comes off "friendlier" than his opponent, Reza Aslan.
Ironically, in this debate, the power of Harris spoken arguments remain just as strong as his written ones, while the arguments presented by Aslan are rather underwhelming, whiny, and altogether reek of special pleading.