I agree...the Goldnerds spreadsheet is very good...but pay the extra $100 and get the Professional version as it will allow you to work out EV's and total cost of "ownership" TCO.
I've found their research pretty much up to date and their concept of "minable gold" is a handy one where they allocate percentages to inferred, proven etc etc...just like Troyus is doing.
I've come late to this thread and Troyus, I'd like to say a BIG thanks for what you are doing whilst acknowledging the caveats made by other posters.
Waiting your spreadsheet and I've picked out a good bottle of red to accompany it...bugger 60 Minutes and the actual 32 minutes of depressing information it contains!
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