Very nice system!
A buddy of mine just picked up a Copland 504 which he is very happy with.
It did not come with any type of manual, were you able to source out a manual anywhere for your amp?
He is not sure how old the tubes are in his, I told him he should probably re-tube it which should give him an up to date base line for performance and tube life.
Your Ideal Innovations Custom 10-SE looks very interesting and might be something that would match very nicely with my newly built "Cornscalas" speakers. I am guessing 5 wpc in SET would do a great job on these 100db plus speakers?