I agree with Mar to me David Tua stands on top of the heep.Most people forget to mention GEORGE FOREMAN.Sure the old days we seen him knocked down but with his second time around.How many times. Zero.You guys can't laugh but I think Lennox had a great chin as well I mean look at the punches that knocked him out by McCall and Rahman if those right hands landed on anyone.They'd be put to sleep as well.Jerry Quarry has to come to mind also.We've just watched him take hellaticous shots on youtube recently.He's pretty much done that throughout his career.