I like my parallel SET 2a3 monoblocs (Audionote uk Kagekis). They probably have more than enough power for the AG unos.
There are plenty of other amps that would work well with the AGs. I've heard Duos with a variety of amps and they did not seem to be particularly difficult to match to amps. The Duos sounded different with each amp, according to the particular qualities of the amp, but they sounded good with almost everything decent. I particularly liked them with the Art Audio PX-25 amp and with the Viva Solista.
There are plenty of other amps that would work well with the AGs. I've heard Duos with a variety of amps and they did not seem to be particularly difficult to match to amps. The Duos sounded different with each amp, according to the particular qualities of the amp, but they sounded good with almost everything decent. I particularly liked them with the Art Audio PX-25 amp and with the Viva Solista.