Okay, so i went to the shop for 1h A/B listening between nightowl and aeon.
This time i could understand very quickly their differences.
Nightowl has more bass presence than Aeon, but maybe too much for me, the presentation felt a bit small and vocals were kind of veiled, a strange feeling. Plus when a female vocalist get on s sound, it was a bit painful to listen. Otherwise, the soundstage is detailed, but not as accurate as the Aeon.
Aeon maybe lacks few bass, maybe it is the 2dB reduction on low bass but their quality is there. A bass just in between both headphones would have been perfect for me but i'm not a basshead, aeon soft and precise bass is enough to make me happy.
What impressed me again in the Aeon is his detail of clarity, the pure vocals, his imaging, separating instruments so well. A balance close to perfect. The treble is extended just enough, the bass doesn't swallow mid range, it is a pleasure to listen. I heard some details in few songs i never did before, off vocals, guitar strum feel so natural. This is the way i love music : Natural sound with great presentation, detail and spectrum balance.
I tried the Oppo PM3 in a last attempt to have no regrets but it was quick of a match. I felt the PM3 more compressed, not retreiving the level of detail of the Aeon nor the great separation of instruments.
I bought the Aeon without a regret
I already like their sound, waiting to see to what extent they can evolve.
I wish it had a bit more bass but the mid is so wonderful that i fall in love with my favorite vocalists again
Thank you Dan, you made one more very happy guy