Before you decide on the OLED, do identify whether you are a contrast person i.e. someone who values shadow detail, or somebody who prefers brightness/luminosity i.e. bright and punchy pictures, especially during HDR playback.
Another thing to consider is that while OLEDs look great with good/great quality content, the gains are less palpable if the content (such as most videos on youtube barring those with high production budgets) isnt stellar.
Case in point, i got myself an LG G1 and i found its brightness to be underwhelming, especially in the context of flagship TVs, so much so that i had to immediately go buy an LCD TV (with full array backlight dimming and over 1600nits of maximum brightness) to compensate for what i was lacking.
Again, colours typically look better on an OLED but unless you do a side by side comparo, most people cannot tell.
However, the picture quality in a good LCD stands out immediately and gives immediate gratification, at least in my experience and based upon a focus group consisting of some friends. Again, this due to its much higher brightness/luminosity compared to OLEDs.
With respect to burn in, the OLED does give me sleepless nights (because i leave the TV running while sleeping
) but only time will tell whether these concerns have any basis.
Lastly, do check out the new samsung mini LED tvs. Their black/shadow performance is supposedly only marginally behind that of OLEDs while its brightness is in a whole different league which OLEDs simply can't match up in any way, shape or form.