Any love for the Belles Aria or other recent Belles amplifier?

I recently heard a Belles 150a Hotrod with Triangle Zerius speakers and a transformer volume control.  The sound is one of the most compelling pairings I have heard.  I am considering purchasing a used 350a or a new Aria or 150a ref. v2.

Has anyone spent time with one, two or all three of these amplifiers?  I'd like to spend as little as possible but still have an outstanding match with the easy-to-drive Zerius.  I like the idea of an integrated if it sounds as good as the bigger amps just with less output power.

Your thoughts would be greatly appreciated!