Something with balls. The Aria 936 is not as efficient as the specs might have you believe. I'd look for a class AB amp of at least 75watts/ch RMS power. $1K is quite limiting as far as new amps go, so you might be better off with a pre-owned amp.
You could do a lot worse than this Luxman:
https://www.audiogon.com/listings/lis9h4f7-luxman-m-117-stereo-power-amplifier-m117-20059-solid-state
or this Exposure:
https://www.audiogon.com/listings/lis9h6b6-exposure-2010s-stereo-power-amplifier-2010-s-20544-solid-state
If you must buy new, I'd get this Parasound:
https://www.audioadvisor.com/mobile/prodinfo.asp?number=PAC2250V2
^Nowhere else are you going to find a brand new amp of that quality and power for $1K.
You could do a lot worse than this Luxman:
https://www.audiogon.com/listings/lis9h4f7-luxman-m-117-stereo-power-amplifier-m117-20059-solid-state
or this Exposure:
https://www.audiogon.com/listings/lis9h6b6-exposure-2010s-stereo-power-amplifier-2010-s-20544-solid-state
If you must buy new, I'd get this Parasound:
https://www.audioadvisor.com/mobile/prodinfo.asp?number=PAC2250V2
^Nowhere else are you going to find a brand new amp of that quality and power for $1K.