You just spent $15,000 for speakers. You shouldn’t go cheap with the electronics. Pass Labs is a brand you might take a look at!
http://store.acousticsounds.com/d/119195/Pass_Labs-INT-60_60W_Class_AB_Integrated-Integrated_Amplifi...
http://store.acousticsounds.com/d/119195/Pass_Labs-INT-60_60W_Class_AB_Integrated-Integrated_Amplifi...