Another option, albeit with a bit of a different sound signature, would be the Hifiman HE-R9. It’s got a little bit of a richer and perhaps a more dynamic sound versus the Aeon, which may actually pair well with your more neutral sounding amp. Here’s a review of the HE-R9 that includes a comparison to the original Aeons in case you might find it helpful...
https://www.head-fi.org/showcase/hifiman-he-r9-closed-back-dynamic-headphones.25762/reviews