Well the PortaPro's arrived today - so far so good - Much comfier than I thought (apart from the hair pulling >< ).
Separation of sound and stereo performance (I guess this is "soundstage"?) seems improved over some of the IEM's I've been using (which were very much bass orientated) - but still bass response seems nice and full and a bit of Miles Davis showed some nice clarity and detail too - I like them!
So now just got to keep with them and wait for the MDR ZX700's to pop through the door next week sometime :-)
I don't know if there are any mods worth doing on the PP's straight away or not - will do some reading but at the moment pretty happy with their sig.
Edited by heartyparty - 3/19/11 at 3:19pm