Hi there,
I hacked together a small webpage which calculates and compares the gold cost per research point given different researchers/magic scales/number of turns.
Here it is, in the hope that someone else might find it useful:
http://hep.nbi.dk/~kittel/dom2/
Comments are very welcome, but bear in mind that I havent used any effort on the layout or stuff like that... :-)
Cheers,
Thomas