Given that, I found that 35 WPC SS was not enough - they lack clarity at the volumes I listen, but this is nonetheless in my ~500 ft^2 living room (15 ft cathederal ceiling) so it's not a large space relative to the capabilities of the devices - I'm not stressing them.

I just don't have much faith that 1 or 2 tube watts would do the trick for me, but reading what many people say it certainly ought to. Sort of confusing.