Just so ya know: http://folding.stanford.edu/home/more-core17-wus-are-on-the-way/ Been running on core 16's past 2 days.
The pain is not quite so marked with the 'Green team' - the PPD on my GTX 780's is about half for Core 15 compared with Core 17. Still, looking forward to the roll out of some more 17's ...