Leemaze,
I have two systems. I started upgrading one (moving away from SONOS streamers) which created a whole new journey down the rabbit hole of slowing upgrading everything. I landed up buying and later selling different things in a quest to get my digital sound as satisfying as my turntable set up.
In the system (used to be Rega) I now have a Linn front end, Pass Labs pre, Pass Labs amp and Spendor D9 speakers.
I have heard four amps in the Rega line. I found the Elex-R was the sweat spot for the money. I have not listened to the new Aethos though.
I like the Rega sound. I find Rega is one of those brands the benefits from a system being all Rega.