Bought myself a set of Zulu3s today, have to say I find them to be extremely comfortable! The contour of the new seals is subtle but I'm sure will do an excellent job. HEAPS of space inside the ear cups, even big ears like mine fit in easily and the noise cancelling is excellent but I haven't had a chance to test them in the Aircraft just yet.
Glad to be back to the smaller control box and only needing 2 batteries and definitely feel more comfortable to wear as well. Will probably report back in a week or two with my experiences using them in flight if no one else has already done so.