Those Sansuis...my buddy has them and I listen to them every time I go over there. He also has Nuance, Bose, Polk and the new Pioneer bookshelves by Andrew Jones.
His Pioneers (see link below), blow those Sansuis away in every respect. The standard M60s are light years ahead. They not only blow the Sansuis away - they leave a worm hole at the site of destruction.
http://www.amazon.com/Pioneer-SP-BS22-LR-Designed-Bookshelf-Loudspeakers/dp/B008NCD2LG Getting back to your vintage receiver predicament, this is why I've been petitioning Axiom to build a sub out on the Axiom Air Gateway. You, me and all my friends could benefit by bringing legacy gear into the 21st century.