I run a 2220 into Paradigm Atom v.6's (90dB sensitivity) and at 40% volume they are too loud for a room that is 15'x25' .....all without clipping. Mine is mint and has been recapped and LED upgraded and I paid $160. I love this amp and the sound is fantastic.
Below are pics of my setup. Out of the picture is an HRT MSII+ and Dual 1019...and since this pic was taken, I have added a Schiit Asgard just to the right of the Marantz.