What is the best 2A3 SET Amplifier?

For your hi-end Avantgarde 2.1, you should use the best 2A3 SET amp that money can buy.
Forget about the Cary, Wavelength or any SET amp that are made in USA(they are beginner in SET amp design!) - poor design, very low quality parts that including the output transformer!
*Cary designed a 300B amp that give out 15 watts/channel. I don't think the designer understands the 300B tube at all. It is a complete joke!

If you have the $$$, the best is:
Audio Note "Japan" 2A3 SET amp
JC Verdier 2A3 SET amp and similar 2A3 SET amp from L'audiophile

And remember always use NOS 2A3 tubes, please don't use any modern 2A3 tubes........

Yes, you are absolutely right. The good old US did created the 2A3/300B and even the SET amp but those are accient history........ But they also the first one to abandon it.........
Back in the 1920 or so, all those hard-working Bell Lab engineers/scientists are the true pioneer/inventors in this field. They are creating a whole new technology. I don't see there are any corelation between them and the current designers or copiers.
Please look underneath their SET amp if you know what you are looking at. Poor parts, poor circuit design and poorly design tiny output transformer(mass produced in Taiwan). It doesn't take a rocket scientist to figure out how it sounds.
The Japanese are constantly refining the SET amp since the mid 60's. French are doing the same since the mid 70's. And the US are doing it recently(early 90's). Don't you think they are just a baby!
Thanks for reminding me to crawl back to my hole.

May be you should go out from your hole more often.