Thanks for the views acturtle.
The problem with AMG is that there doesn't appear to be any broking report on it thus far. And I had a feeling it was pointless to compare projects - I've had a look at a basic mining valuation text (the one by Rudenno) and he pretty much suggested the same as you, given the number of variables you need to know to work out the NPV. Something like that. OH well.
