In my opinion, SA500.1s better my Primare A32 in most every respect. The Carys are more detailed, deeper bass (I have never heard the 3.7s go deeper) and overall a much more up-front presentation, whereas the Primare is definitely a bit recessed.
The Carys run very cool, probably the "greenest" power amps I've ever seen.
Overall sound stage is similar to the Primare, with the key being you are sitting a bit closer with the Carys. Overall width and depth I felt are similar..'probably would require a "golden ear" to discern further differences.
The Carys increased increased detail (again compared to the Primare) fortunately does NOT at all come with any harshness. I could have in all likelihood pulled the trigger on the Carys and lived happily ever after.
Then on a whim I figured I'd give the Parasound JC-1s a listen. Figuring no way I'd prefer them. Well, all I can say is that that high-bias at low listening levels is amazing. I've never heard greater "inner detail", ever!
'hope that's the correct term!
The downside of the JC-1s is of course the heat output. far far greater than the Carys.
So, I'm still sitting on the fence a bit. Trying to decide between a brand new design that sounds absolutely great, compared to a 10ish year old design, that throws heat, but can sound absolutely magical within that "Class A" range.
Decisions Decisions. At this point if I was pushed to make a decision immediately, I'd probably go with the JC1s. but I'm deferring any final decision for a couple more weeks.