Mixing eras

Wanted to get some opinions on integrating new speakers with 90’s hifi gear. Currently with McCormack DNA-1 with vandersteen 3’s. I love the combo. However they just are too bulky for the room they are in and the boss wants a smaller speaker. Was thinking about KEF R3 meta and the KC92 sub. Maybe I’m over thinking it but 30 year difference in the amp and speakers has given me pause. Also wondering if I am stepping up or down in terms of sound and quality. Probably over thinking all of this but figured I would get some opinions from you kind folks. If not the KEFs any suggestions on a more age appropriate, but  smaller footprint speakers? Thanks so much 

Michael