You’ve provided some very good info keso.
I bought a Hisense tv a couple of years back and it’s been excellent. It gets gamed on a lot and still has a vibrant picture for film watching.
I love Sennheiser equipment (my best microphones are Sennheiser and Shure).
I looked long and hard at the Samsung QN90 last Christmas, but because I needed to buy both a 65″ and 40″ I opted for the Samsung AU9000 which was much cheaper than the QN90, but is amazing in it’s own right.
Mike, keso and others have given you some great info and advice and I’ll add just one thought …. Make sure you stay firmly within your budget.
Cheers guys.