If the Q90R has hdmi 2.1 go for it.
It probably doesn't though so go OLED like I'm doing tomorrow.
65c9 will support g sync and have has hdmi 2.1 that's where my money would go even the 1st gen OLED makes my ps4 look so much sharper and smoother than an lcd
Whaaaaaaaat? they offer £6/month burn in protection????currys with the £6 a month burn in protection
Just buy the knowhow insurance they've been well documented replacing peoples panels for burn in on avforums.
I myself had a panel on a Sony XF9005 telly replaced twice because I had a single dead pixel right at the edge of the screen too so it covers pixels if you ask nicely.
You pretty much won't get screen burn on the C9 anyway just set logo illuminance to medium and any HUD elements and TV logos will be at a slightly lower luminance to the rest of the game you're playing.