Thanks for the recommendations.
I haven't heard the SR-009s but I personally wouldn't be prepared to drop that much on a pair of headphones without first seeing a number of different blind tests proving that they sound better (and choosing them myself in a blind test).
I wonder: could the Realiser be used not only to mimic the sound of speakers, but also of other headphones? You could potentially cut your collection down to a single headphone, plus measurements of a number of others. :)