Hey Shaw, just picked up a 65" C7 myself after having over 9 years on my LG Plasma 60" which was starting to degrade, especially around image retention. It would happen quickly, and take a long time to fade. That said it was still a very nice movie experience.
After a week I'm still adjusting to the new tv - so many inputs, so many modes on each, all need to be tweaked ;-). Used youtube channels as setup guides/tips. As far as brightness, I've set back the OLED Light on everything back to no more than 60 as it is just so bright. Even 1080 via the NextBox 3.0 is so crazy vibrant that I played with the de-judder etc to limit the soap-opera effect. All this and the 5 inch larger tc has a lower top edge, bottom edge, and is no wider overall then the plasma with the thin edges - the crazy thin screen is amazing as well.
Lots of 4k but just from Amazon Prime and Netflix for video, and my Xbox One X for HDR gaming and super low response times. Really disappointed with the 4k uptake on tv broadcasts vs the HD transition making a 4k Rogers box not really worthwhile except to the most hard core sports fans (all my hockey/football has looked pretty darn good compared to that older plasma already).
I'd been watching OLED since 2014, and hoped in the run up to the Super Bowl we might get even lower than 2999 for the 65" set but decided this was the time to go. I see the big game leadup sales are still at 3300 so I'm ok - The 2018 sets aren't a big enough leap to either wait for or pay more for at this point with the state of my old plasma...
Jethro - LG OLED65C7P, NB 3.0, Yam HTR6190, Polk, Harmony 680, Xbox One X