Since my June post, I have received my upgraded Clayton M300 amps and they are outstanding. Totally quiet, they improve on the earlier version in dynamics, bass depth and slam, and dimensionality, none of which were weaknesses with the original version - just that the new version is better. I believe the improvements are mainly in power supply and even larger/better transformers. Of course, the Clayton's are run fully in Class A bias, which means even with their low/high bias switch, it is best not to leave them on all the time. A blessing and a curse, the Class A issue is one reason I seriously considered the Cary amps, and ultimately the reason I stayed with the Clayton's - they just sound so darn good.
Regarding the Cary SA-500.1's, I will post some links that I was able to find, but nothing except the Moon Audio link is new since June when I last looked. Cary did tell me they were sending a pair in for review by a major audiophile magazine, so be on the lookout for an upcoming review. Here are a few links I found in addition to what's on the Cary site:
http://www.stereophile.com/content/cary-audio-design-goes-solid-state
http://www.ultrahighendforum.com/viewtopic.php?f=199&t=4074
http://www.moon-audio.com/home-audio/cary-audio/cary-sa-500-1-solid-state-power-amplifier.html
Regarding the Cary SA-500.1's, I will post some links that I was able to find, but nothing except the Moon Audio link is new since June when I last looked. Cary did tell me they were sending a pair in for review by a major audiophile magazine, so be on the lookout for an upcoming review. Here are a few links I found in addition to what's on the Cary site:
http://www.stereophile.com/content/cary-audio-design-goes-solid-state
http://www.ultrahighendforum.com/viewtopic.php?f=199&t=4074
http://www.moon-audio.com/home-audio/cary-audio/cary-sa-500-1-solid-state-power-amplifier.html