2.3 is ok with almost anything under the sun except for Sony XBA4 and lookalike iems.
Stereo crosstalk has disappointed me a little bit though. I'm pretty certain that iPhone 5s fares about 10 decibels better in that department.
In any case from now on people can weigh in subjective impressions along with objective data (this mixed approach has always served me well to choose sources).
Meh, don't worry about cross talk so much, at those levels it's inaudible. The noise floor is higher in almost all recordings.