Amp to match Avantgarde Uno G2 horn speakers

Hi, I listened to a pair of Avantgarde Uno G2 horn speakers two weeks ago and was really captivated by the sound. I heard it driven by an Audionote Meishu SET amp which outputs 9 wpc. Since the Uno G2s have a sensitivity rating of 104dB, that was more than sufficient.

What I'd like to know is: is there any other amp that would be a good match for the Uno G2s? Must it be a SET amp to bring out the best of the Avantgarde horn speakers? I noticed that Avantgarde dealers will invariably sell Audionote tube amps too. How about the Pass Labs XA30.5 pure Class A amp? Would they drive the Uno G2s well? Looking forward to your replies. Thanks.