How big dimension wise is your room? The RC-62 would be a better match for the RF-62s, but the RC-52 would work well and be better than the 10. You may find the RC-10 fatiguing after awhile.
The RPW-10 sub doesn't go any lower than the RF-62s but it does give you the ability to utilize the LFE channel for movies. Folks around here find the Klipsch subs underwhelming for the most part. Being that you're in Canada, your options for better subs are more limited on a cost basis. You could look toward a model from SVS through
SonicBoom Audio that would be a better choice.
I would definitely bump up to the Denon 789 for a few better feature options.