I just purchased a pair of Reynaud Bliss Silvers/Magic Stands, and I have Triangle Zerius and a pair of demo Finale Vivaci Mini speakers. Different amps from the Belles lineup will match up better with different speakers, or at least that is my assumption. I think a 350a Reference would be best with Reynauds, but the Aria is probably best for the Triangle and Finales.
It sounds to me like I can't really go wrong with any of the Belles amps. I appreciate all of your feedback - it reinforces the positive evolution of the 150a Hotrod by a highly talented designer.
I'll post some impressions once I get the Reynauds and Belles amplifier in the house. Based on hearing the Reynauds at Amherst Audio, I think the Belles pairing could be a grand slam combo, but I do love my Zerius...we'll see.
Thank you all for your insightful posts.
Cheers!