Consider a pair of Coincident Triumph Extreme monitor speakers.
Super easy to drive, so they don't need to be played loud to be heard, & for a monitor they go pretty low. You get it all without upsetting your neighbors.
Frequency Response: 45 hz - 35 khz (+/- 3 db).
Impedance : Flat 8 ohms
Sensitivity: 94 db @1M - 1Watt