A few of my own observations...
I thought the expensive sony the best.
I was suprised at how poor the Rode sounded, very muffled with some hum.
The PC4 mic was truly awfull and the voice was ruined by it's autolevel function.
The on camera VX9000 mic sounded worse than I expected, I think the first 2 words may have been clipped slightly.
The lapel mic remdered my voice very well but is clearly totally omnidirectional as it got most room noise.
BTW the expert I read was from a book called 'the five c's of cinematography' by joseph V. Mascelli - isbn 1-879505-41-x I highly reccomend this book.