I think you'll find gold rising because of:a) yes, USD declining...

I think you'll find gold rising because of:

a) yes, USD declining (but gold is rising against all fiat currencies - including Australia!);
b) declining production - South Africa, most of the majors, established mines are getting deeper etc.
c) rising demand eg. gold bugs, india / chinese public, middle eastern / chinese / russian central banks.

The advantage of juniors if you find the right ones (and spread your money over quite a few because of the risk) is:

a) rising production in the face of rising gold prices;
b) can choose those in safe parts of the world;
c) re-rated as they get closer to production;
d) likely buy-out candidates for the majors since they are struggling to replace their reserves (& their production);
e) open cut - cheaper to mine than the majority of established mines

If the ducks a lined up, the rewards will be staggering. That is the carrot.