If I am you I would have two options
1) No further update and happy with the setup for the next 10 years
buy emotiva sub, RC-62, RS-52 or RB-61 for surround and use your HK to power everything
2) upgrading path within a year or whenever you find a good deal or whatever budget you have to spare
buy first a sub second RC-64 and third RB-81 or RB-61 depend on your money since you don't like dipole. Fourth RF7 or RF83 as front and move your 82 to rear for 7.1 or sell the 82 or the surround back. you can look for use market on here. then I would buy the emotiva xpa series last.
by the way you need inducers (shaker) for your couch to watch movie they are awesome