^^ I dunno man he has the full set of speakers for a 5.1 setup, so I'd probably try to find the easiest to use 5.1 receiver that has enough juice for what apparently look to be 6 ohm speakers. Could be anything really as long as it's a 5.1 receiver.
Maybe this Yamaha? I've never used them but pretty good reviews. 5.2 would allow you to add another sub, lol:
https://www.crutchfield.ca/p_022RXV4....html?tp=73415