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For those who really want to dig into the 607 date issue, Carl Olaf Jonsson's The Gentile Times Reconsidered is available. Ray Franz refers to Carl's research in CoC. It was the depth of Carl's research that convinced Ray that the 607 date was wrong.
I'm always amazed when JWs say the 607 date isn't that important. If it is off by 20 years, then the whole basis for the 1914 "invisible parousia" is gone. It's that's gone, then the idea that Jesus was present then and selected the WTS as the "faithful and discreet slave" is gone too.
If you want to examine the reliability of the Bible too, FAQ, that's fine. Just make sure you don't throw it out just because some 19th-21st century organization in Brooklyn aren't who they claim to be.