There's a Marantz SM-11 power amp in the listings right now for $2K even (original list $4600). 110W into 8 ohms, 220W into 4 ohms, 101dB S/N ref 1W into 8 ohms. This seems to meet the OP's requirements. I recently acquired one of these myself, along with the matching preamp, and am very happy with it.
No knowledge of or connection with seller, etc
No knowledge of or connection with seller, etc