I've recently purchased New Stock Electro Harmonix with 14 01 numbers and black boxes.
They are amazing, period.
Sound is Crystal Clear, Separation is Mad, Dynamics are just in your face, for a moment there I thought "Is there really something better?" even though I really am going to buy the HE-1000 and also probably the Ragnarok amp (Since I don't really enjoy changing tubes when they go dry to be honest)
Also I heard people saying that Electro Harmonix are bright, I also still own the HD700 (Which is supposed to be super bright) and I couldn't tell you about the brightness, more detail in the mids and highs (More pronounced?), yes, but it's not the same harsh in your face brightness like what I experienced with the Bryston BHA-1 amp.
A link to the ones I bought:
http://www.ebay.com/itm/Matched-Pair-NIB-Electro-Harmonix-E88CC-6922-6dj8-tubes-Test-NEW-/201235552978?pt=Vintage_Electronics_R2&hash=item2eda92dad2