Maybe not most underrated but the Panasonic S1 is definately underrated outside of this forum. It's giving an FX9 quality image for peanuts. I would say it could compete with the C500 MK2 and C300 MK3 as well. The C500 can see into the shadows better by 2 stops or so, but it doesn't have dual native ISO. The Panasonic S1 can do 4000 iso with 4 stops of headroom in the highlights and a couple in the shadows. That punches the C500 dynamic range in the gut at the same ISO.