Salam Alaekum, brethen in the deen of Al Islam.
I have watched the video lectures of Dr Zakir Naik on net and am quite Impressed with the Knowledge Allah has endowed him with. He has debated with christians, hindu etc.
DR ZAKIR NAIK is the president of the Islamic Research Foundation and i believe my Brothers and sister will benefit immensely from his lectures especially the debate aspect of his lectures.
search www.devilfinder.com or youtube for more info.
Please if u have watched any of his lecture kindly share with our brothers and sisters here.jazakallahu khairan.