It's a much better amp than comments here would suggest, and for some reason people here often like to comment on gear they haven't actually heard. You'll enjoy it a great deal, and the way the Sonos gives you access to your music will add a lot to that.
Have a look through the other threads for some speaker ideas. Don't obsess about getting an especially efficient speaker, it's not the most important criterion. Just avoid the less efficient speakers.
Have a look through the other threads for some speaker ideas. Don't obsess about getting an especially efficient speaker, it's not the most important criterion. Just avoid the less efficient speakers.