Of the three, neuroimaging seems most attractive to push (to me, Robin might say it's the worst because of more abrupt/unequal transitions), but that doesn't mean one should push any of them.

It looks to me as though Robin would prefer computing power to mature last. Neuroimaging research now could help bring that about.

http://www.overcomingbias.com/2009/11/bad-emulation-advance.html