Some of my equipment are purchased used (main speakers JBL S38-purchased used from a neighbor, Totem Storm sub-purchased as a store demo) I can live with that.
If you get used to the B & W signature sound then you should upgrade to the new 683 floorstanders. They look good and sound good too.
Outlaw Audio power sub is an outstanding value for the $$$ if you ever decided to upgrade your sub.
NAD separates or Outlaw monoblocks are good choices to upgrade your amplification.
NAD C545, Cambridge Audio 640, and Rega Apollo are good buys when it comes to source.
Just some thoughts