@TheAlpha Haha, wicked, love the coincidence! I've only just received the JRC4556 from Australia and haven't got round to buying the others yet. Really looking forward to listening to it and will let you know my thoughts when I have.
Really appreciate your thoughts on them buddy -so we've just got to get the right one for our own headphones. And the upside is when you change your headphone, you change your amp signiture. Excellent!