I do realize I do not need the play 1. This has been very helpful.
That’s okay, I was just worried you may buy Play:1 Speakers, thinking that you need them for the front-left and front-right, when those channels already form part of the PlayBar/PlayBase/Beam etc.
The new Sonos Amp can be used for both the front and rear channels ... when used at the front with the TV it creates a phantom centre channel.
For larger rooms Sonos recommend their older PlayBar, or PlayBase. (The PlayBase 'only' has built-in Airplay, neither has built in Alexa control)
For medium sized and smaller rooms Sonos recommend the new Beam (This has both built in Alexa and Airplay)
The new Amp is for larger rooms too, but not released till later this year. (It has no built-in Alexa, but I assume it will have Airplay) .. it has no true center channel. It can operate wirelessly for both front and rear setup.
The Connect Amp is the older device and has no 5ghz radio, no built-in Airplay, no Alexa Control. It cannot be used with the TV at the front, but can be used for bonding the rear speakers in a 5.0/5.1 setup with the other Sonos devices, but to do that it needs to be cabled (it won’t operate with bonded rear surrounds over wireless).
I hope that information helps to provide you with a better-informed decision.