Probably something in the Schiit family like a LYR3 would work well. I think you would need a little bit of power with the Aeon2s. I don’t have a set of A2s, but have the original Aeon Flows.
I was going to suggest you check out the Headamp GSX-mini, but it’s way over your target price ($1800-$2K). That is an exceptional solid state headphone amp but at a much higher price range.
Cheers. -------Robert