highly sensitive loudspeakers for single ended poe

The Athena and DA-RMa models from Daedalus Audio I believe are within your price range (email them for current pricing), and meet your sensitivity criterion. All Daedalus models are highly regarded for their natural sonic character, their versatility with respect to amplifier selection, and their beautiful real wood construction, among other attributes.

Good luck in your search. Regards,
-- Al

The sensitivity rating is not the only thing to consider when matching a speaker to single ended amplifiers. The impedance, number of drivers and the complexity of the crossover are other major factors.

Check out the Tannoy Prestige line.