Sam,
At the moment you are spoilt for choice!
For management quality, FDI would be my first choice, then AFD / EPD, and lastly Petra, although I have never studied them closely, so am possibly being unfair to PDL by picking them last.
Another producer would be BDI.
If, as Resourceful suggests, it's the American Diamonds subsidiary, then I cannot see why FDI has fallen like this, as I don't think anything was in the price for the US exploration in the first place, (although the potential would have been lost.)