Me and the other half bought Schuberth C3 Pro's with SC10U's. The chin flap and neck seal block most of the wind noise. The muffler that goes over the mic helps too, are you using that?
The only time wind noise is an issue, is if I'm on a naked bike doing stupid speeds. Then wind noise is all we can hear.
Saying that, the C3 Pro is famed for being a really quite helmet, which is one of the reasons we got them. No idea what the E1 is like.
What's the gap like around your neck?