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 :
A-9010 | ONKYO Asia and Oceania Website
Onkyo A9010 is one of the best sounding budget amps we've ever heard - Audio Affair Blog
Onkyo A-9010 vs Onkyo A-9050. Which is the Best? - BestAdvisor.com