Good reading.
IMO, the NEX seems like the best the choice for mounting manual focus lenses with its peaking feature. I haven't tried peaking yet, but it seems to be a more accurate and quicker way to manually focus lenses than using a magnify feature on either the Pany G or Oly Pen, unless the magnify feature is an auto-magnify feature (magnifies at the turn of the focus ring), which will not happen with lenses without electronic couplings.
Peaking might actually be better than using a rangefinder patch! Yes, quite sacreligious, particularly coming from the mouth (or keyboard) of a Leica user! But I suppose I better not spew such venom from my mouth just yet, given that I haven't tried peaking yet!