if you are looking at the XF90 then this
https://www.hotukdeals.com/deals/lg-oled55b8slc-55-inch-ultra-hd-4k-hdr-oled-tv-999-at-box-3257015
how much gaming usage though? if it's going to be greater than 40% gaming usage then I'd suggest the XF90
the OLED is a top tier tv as in a 9.9/10 so it's worth the extra £200 with the only issue being screen burn if you use too much static content.
the XF90 is again a top tier tv but at the lower end of top tier so maybe a 9.2/10 but it has no burn in issues.
the other tv's you have listed are all mid end or lower mid end.
so the extra £200 is worth it to go from mid end to top tier. especially since it comes with 5 or 6 years warranty and likely be kept for 5+ years so it's worth the additional outlay.
if i had to choose for £800 then i'd go for this
https://www.argos.co.uk/product/8192855
or the RU8000 here
https://www.hotukdeals.com/deals/sa...4k-tv-749-with-code-at-reliant-direct-3257637
The
Samsung NU8000 is a bit better than the Samsung RU8000. The NU8000 also has a local dimming feature that can improve dark room performance. The NU8000 has better SDR peak brightness and is more suitable if you have a bright room. The NU8000 can also get brighter in HDR and has a better color volume, which is great for HDR content. The RU8000, on the other hand, has a lower input lag, good for gaming, and a faster response time, great for watching sports.
personally i'd pick the NU8000 if a strict £800 budget.
but i'd honestly stretch the extra £200 for the OLED or the XF90 so long as you are aware of both's pro's and cons