Keep the QS10s … big improvement over the 8s IMO … the 10W difference is not going to make a much of a difference …
If the receiver has pre-outs then off load the front at least the front 3 … the surrounds don’t usually get that loud.
If you like to play things loud then you’d need something with some headroom and/or much more continuous power.
This is where an ADA1000 or better makes a big difference.