I not buy online. Panasonic is default preset on more natural color instead of very vibrant. But all this can be tune to your preferable.

It is better compare by yourself and decide as different people different preferable.

For me this Panasonic is very great on up-scaling STD contents. It is very well done. The only cons I can said is they is a very slight light border shadow on this EX600 model.

• Sony X70E - It is nice but far more expensive and not running Android TV like others Sony this year TV, only start from X80E is Smart TV running Android TV OS.
  
• Samsung MU6100 - I never like low end Samsung TV as it was not good.
  
• LG UJ630 - I love LG new design remote which is very easier for input. LG WebOS design also much appealing. I initial is intend to buy LG TV. Support 2 out of 3 HDR format (HDR10 and HLG). The Smart OS is WebOS.
  
• Panasonic EX600 - End up I choosing this and no regret. Just the only cons part to me is that very slight light border shadow. Support 2 out of 3 HDR format (HDR10 and HLG), website only mentioned support multiple format and I already test it confirmed is support HDR10 and HLG. The Smart OS is Firefox OS (now already purchase by Panasonic).
  

They is 3 HDR format in market. HDR10, Dolby Vision and HLG. HDR10 is the very common format and now all HDR TV is support it, awesome output quality, UHD Blu-ray is on this HDR10 format. Dolby Vision as I know only the LG OLED TV support it, so far as I know only Apple TV HDR is on this format even though it is the best ever did. HLG is the selected format for broadcast.

You can get a lot HDR sample to test here - http://4kmedia.org/

I bought Pana tv sometime in Dec 2017 and I got a FREE Panasonic High speed 4K Gold plated HDMI cable.

I have existing cable, so didn't use it. If u want, i can sell to u RM 50. 

If your existing cable can send a 4K HDR signal from your 4K Blu-ray player to your 4K HDR TV, and the TV shows a 4K HDR signal, then you're set. 

LOL...thats y u need to test the cable by making the connection.

Then on your TV, make sure u get the 4K resolution and check the Activate ”HDMI HDR Setting"

Panasonic increase all the price already, during the time I bought 43" EX600K official price is RM 2,599.00 but now increase to RM 2,799.00 already.

Just get any High Speed HDMI cable will do. Only High Speed HDMI cable support 4K resolution.
I don't see the required for manual, every setting have description when you point over to it.

Yup support 2 out of 3 types of HDR. The HDR10 and HDR HLG.
Not support Dolby Vision. This only available in very few superb expensive OLED TV. No need Dolby Vision as only Apple TV support it. The rest 99% is HDR10 include UHD Blu-ray. HDR HLG is future broadcast HDR format and so far not really have any content yet for the moment beside that only 2 demo available in internet.
I also get that. Now use it to connect my old Samsung Blu-ray player via HDMI 2.

I notice one thing is Panasonic HDMI 3 not support Deep Color as it won't show anything once you turn on that setting in your device. So now I using Mi Box in HDMI 3 since the Mi Box Deep Color setting is all way wrong and should be turn off for the moment.

HDMI 1 is connected to my Panasonic UHD Blu-ray Player - DMP-UB400GAK.

Nothing appear on screen. No signal if your device had turn on deep color.

Deep color is working perfectly on HDMI 1and 2 but not the side HDMI 3.

it's best to use HTPC if u want to share pc files and movies especially those more than 4 GB files.

then u can install KODI...i m using this method.