You've heard B&W Matrix 802's? IMO, if you want "authority and slam" look elsewhere. Also, no matter what powerful SS amp(s) you use, you'll never get tight, well defined bass, at least with the S3's.
What they do well is classical orchestral music, where they have that "big British sound". Also they're old now, & drivers & x-overs can/do fail. Schlepping them for repair is not fun, nor cheap.
Just my 2 cents......