Adding second system for vinyl within a Home Theater environment

Do many people have a complete 2nd system within their Home Theater Listening Environment ?

with complete amps/speakers etc. in the same room?

My HSU 5.1 sounds terrific on movies, but i was thinking of creating this second system for heavy rock music JBL/Cerwin Vega etc. and a real high current amp like Anthem or Bryston.

Thanks