This thread makes me laugh.....I used to work with both Rhesus macaques (over 900 of them) and Chimps in Research and I think I'll just leave the majority of my two cents worth out this time other than two interesting facts regarding Chimps:
When they throw their poop at you they will hit you about 98% of the time their aim is THAT good!!
You can give a Chimp HIV and they will never become sick from it like humans will.