The Onkyo A-9010 is the single best amplifier I've heard for anywhere near the price. IMO, it should be the default answer to the “budget amplifier” question that gets asked so often :
Amplificator Hi-Fi Stereo Onkyo A-9110 Black cu set Boxe de podea Klipsch R-610F
A-9010 - Connecting Speakers – Onkyo Product Support