Hi @HarpreetScotland
Welcome to the Sonos Community!
A Play:5 gen 2 will work on S1 with your Connect:Amps, no problem. A gen 1 would work as well, but I’d recommend steering towards the gen 2 unless you can save a significant amount by going for the 1.
I say this purely because a gen 2 Play:5 is S2 compatible, so if you ever decide to upgrade, that’s one less item that needs changed. A gen 2 also comes with AirPlay support, which is handy if you have an iPhone, iPad or Mac.
In terms of audio reproduction, the two are basically the same.
I hope this helps.
The Play:5 (Gen 2) is compatible with the S1 app so it can be grouped with the Connect:Amps.
https://support.sonos.com/s/article/4786?language=en_US
thank you so much for clarification. :-)