I'm using Zulus in a King Air. Love them. I've also used the Bose X, but preferred the Lightspeeds due to better ANR performance, even if the passive damping is better in the Bose X.
Think about panel powered vs battery operated. The panel powered units only had LEMO plugs while our aircraft have XLR sockets, so we elected to go with battery powered to avoid the hassle of using adapters. Blister pack of fresh batteries now reside in the flight bag, they last 40h+ on one set so it's not much of a concern unless you want to use the Bluetooth, which drains the batteries a lot faster.