Finally getting a chance to hear the famed Ety (thanks to shotgunshane for the loan).. some impressions vs the N4 (pictured above) coming. The Ety he sent me has the red filters. I'll say this right off the bat... Ety ER4P/S lovers: you will most likely enjoy the Noble 4.. a lot.
That's a nice bunch of iems over there. I'll hear the ER4 for myself soon but I've always been a fan of them since the ER6i.