> Only downside for me is the need for energizers.

Yeah, this was initially some of my hesitation to try estats early on, as well. Technically speaking, if you did pick up an energizer, you could hook it up to your AHB2 and have an incredible setup - or separately pick up an amp that can be directly fed from one of your DAC's instead. There are older (but still quite capable) Stax SRM-1 amps that routinely show up on eBay, like this one:

https://www.ebay.com/itm/144836240623

This can allow you to run modern estats using Pro bias, as well as older vintage Stax through the Normal bias.