$6k (or less) will buy a pair of Belles 150A Reference or 350A Reference monoblocks. In my system, they have the characteristics you mention. I sold VAC 160 Musicblocs in favor of the Belles 150A Reference amps.
Associated gear is: Atma-Sphere MP-1 MK III preamp, Silverline Sonata III loudspeakers, Modwright Sony 999ES Platinum Signature with tube power supply.
Associated gear is: Atma-Sphere MP-1 MK III preamp, Silverline Sonata III loudspeakers, Modwright Sony 999ES Platinum Signature with tube power supply.