Look at the AM Acoustics room mode simulator. Try to keep your speakers and listening locations out of the lowest room modes.
While I’m a big fan of Luxman, the uber ESL amp is a Sanders Magtech. Definitely the opposite of anemic with ESLs.
PS - Huge fan of CJ pres and amps but have never seen a CJ amp do well with an ESL. Typically keeping a tube pre and solid state amp is the starting recipe for a great ESL experience, though there are exceptions and people who will naysay this, but most people who try this out are happy.