then take a look at the Gryphon Diablo.
Gryphon Diablo 300 best I had heard , But, you might have to sell your wife and kids off to buy one.
He doesn't need the 300, the 120 will do with the efficiency of those speakers at 94db, but nasty impedance loading of down to 1.8ohm in the bass. And he get a ESS Sabre dac thrown in with the Gryphon.
Cheers George