I’ve had some very good luck with Panasonics, but learned to stay away from Sony products.
We have two Panasonic Plasma TVs, a 42 inch and a 55 inch. The 42 inch is about 8 years old and runs fine with a LOT of use. The 55 inch is about 3 years old and failed at 16 months. The extended warranty company (Consumer Priority Services) was a REAL pain in the ass. They had somebody come out to the house about a day after the failure, but then things collapsed. The local service company they hired went dark. I had to keep calling them, but they said they wouldn’t talk to me, I had to talk to CPS. They kept saying the parts were on order but about 2 months went by and no parts. Finally they said the spare parts I needed were no longer in inventory because the manufacturer only makes enough to last a year or so for the TV. CPS offered something like $500 for me to go buy an equivalent new TV; the plasma that failed cost me about $2,000 and there was no way I was going to get the equivalent TV for what they offered. I eventually found a local repair shop that was able to get a refurbished board and fix it for about $400. CPS had bumped their offer up to about $650, so I took their cash and pocketed the $150 extra. But they cancelled my warranty after the settlement - they claimed it was in the fine print of the contract.
Bottom line. Panasonic plasmas had fantastic picture quality but reliability problems (not an issue any more because they are discontinued). After-market insurance companies are everything the reviews say about them — largely crooked and only pay off after you raise holy hell for long enough.