Never had a sony amp before so cant comment sorry
When i was in RS last week they said they had a lot of Sony DNR 1050 coming back with faults that needed repairing.
I've owned 2. The 1st had to be repaired twice before I sold it & the buyer had to get it repaired too. The 2nd one was OK. AFAIK it's still going after 15 years as I sold it to my dad's mate.
I had a old Pioneer Receiver that had something go pop on it some years ago & it was OK after repair.
I've owned in total:
1 Marantz AV processor
2 Pioneers
A Sherwood (Six months was the shortest)
2 Sonys
& a Denon Which I still have, I think its the longest I've owned an AV Receiver.
I would like to buy another AV Receiver with more HDMI sockets & the ability to control it with a phone or tablet app. Trouble is, the silver models are a tad too expensive for my budget & the one I have doesn't get enough use to justify buying a new one.