What kind of pricing have you seen on the Sonos system?

The problem for me making a recommendation is the wireless part. I am much more knowledgeable about traditionally wired speakers, and there are a lot more options and greater price range.

$1000 for a wired 5.1 system and receiver is doable. I'm not so sure about wireless.

Here are a couple of wired options that I would personally own and I'm pretty picky about sound.
1. SVS Prime Sattelite 5.1 System https://www.svsound.com/products/prime-satellite-5-1 They also have an outlet section for a little bit more of a discount.
2. Andrew Jones Designed Pioneer 5.1 Speaker System - https://www.amazon.com/Pioneer-SP-PK...jones+speakers

As for a receiver, one of the slim-line Marantz NR line would be a great piece that would last you for a very long time. https://www.crutchfield.com/g_10420/...FBrand|Marantz

Something in the Denon line would also be a great choice. https://www.crutchfield.com/g_10420/...=FFBrand|Denon

I included links to Crutchfield so you can see the models I am talking about but they can also be purchased at various retail locations.