Amps that bring liveliness to low efficiency speakers?


Looking for used amps only - integrated or power amp, dual mono design. No class D!
128x128zuio
Cayin h80a amp. 80wpc of pure class a. 
Dual mono design. Can be had used for 1500 or so. Drives my mc-rl21s, which are 4 ohm, to sonic heaven. 
Allow me to clear up all this intrigue.

KLIPSCHORNS & Marantz 2252 or 2270


You'll thank me  :>)
Any of the Linear Tube Audio offerings. My favorite being the 20 watt UltraLinear.