Recently my friend Art introduced me to Rabbi Tovia Singer, a Jewish “apologist” of sorts.  He does a lot work with how to deal with Christians who are trying to convert Jews and their friends to Christianity.  And boy does he do a good job.  He has some very good things to say.  Anyway, you can search for him on itunes but I actually found a website that has several lectures from several rabbis, including Singer, so check them out.