I will not be using the ceiling speakers to play different sources. I would like to control the individual rooms from the Sonos app.
That sounds like a bit of a contradiction. Are you saying that you would only play one source at a time, but want to turn off or change volume of each room individually from the Sonos app? If that’s the case, you would gain the ability to play different source by default, as there is no way to separate control of source with volume control through the Sonos app….if that makes sense.
So I think you have two choices really
1 - Get 4 Sonos amps to replace your Connect and Audiosource amps.
2 - Pair the Connect with one of your amps, disconnect the 2nd amp from bridge mode and connect it to a Port. Get two Sonos amps for the remaining 2 rooms.
I would go with the 2nd option, as it cheaper, it’s just not as ‘clean’ a setup where your equipment is stored. Features and control are essentialy the same from the Sonos app. I use a Port and audiosource amp for one of my rooms/zones without any issue.
The Port and Connect are essentially the same thing. If your Connect is ‘S2 compatible’ then there isn’t really a reason to replace it with a Port. Port does have a 12V trigger to turn on your amp automatically, but that Audiosource amp doesn’t need it, since it will automatically turn on when it senses audio from the input.
Note that you don’t have to buy all this equipment at once. You add a Port or Amp here and there as budget allows, giving you more control from the Sonos app with each new add. You may find that one or two of the rooms aren’t used much, and not worth spending money on.