Steve: there are a lot of happy Treo and Treo CT owners here, so I expect they will weigh in with a wide range of user experience, system diversity and of course expectations....
call me biased with 3 pairs of Vandersteen including Treo CT. while I don’t listen very loud in a condo, I have heard them with > 100 wpc tube and SS power. I think they will shine with your neutral power amp. love the CJ also :-)
i am running mine on 40 WPC LiL Mule kicker NAIM amp but have also used a MC240. They are very neutral, image quite well even close to back wall and like most Vandersteen reward careful setup. Mine are wired w Kimber 12 TC in an internal biwire.
my reference system includes both the 7 speakers and power amp and I can say I listen to the Treo for many happy hours on end :-)
enjoy the music !!!!!!!