I'm a big Plasma fan (RIP) but finally had to wave goodbye to my trusty LG for something more modern, networked and 4k. I briefly owned a Samsung UE7000 but that went back because of backlight bleed and frankly because I didn't like it at all.
The big Panasonic is considerably better - in fact I'd go as far as to say its the most 'plasma' like picture you'll get this side of the 2016 OLED's. Blacks are very black, though you do lose some of the detail to get them.
In setting up, I used the AV Forums settings for this model but smaller screen size. I found the colour balance was excellent, but the picture too dark, so I had to adjust the settings to lighten it enough so that much (but not all) of the detail on offer was showing.
Standard def is poor, HD good, 4k stunning. Well worth trying the 4k test channel on Astra to view how good broadcast 4k is - the picture here is quite frankly jaw dropping, and really shows the potential of the panel.
Viewing angles are not great - even sitting very slightly off-centre shows the panel's weakness, though the further you are sitting from it the less noticeable this is. I'm about 6 feet away, so its quite noticeable to me and my off-set guests see a somewhat washed out image. Nowhere near Plasma standards alas!
Sound is average - it's clear enough but as a minimum you'll want a sound bar. I connected it to my Onkyo amp and the ARC worked fine with no synch problems.
The firefox os is pretty slick, though the quality of the apps on offer varies greatly. You'll probably use YouTube, Netflix and Amazon to get the 4K goodness, and these work well, though I found that locking that HD image took longer than on my Fire TV, and annoyingly, the iPlayer settings periodically delete themselves (every few days) so you have to reset them to get HD streaming and the other features in iPlayer beta. This has never happened on my Fire TV.
The set has built in Freeview and Freesat with Freetime built in, but sadly this is where the set does not perform well. Although adding an external HD was easy (once formatted by the tv itself - and note it won't work with any other tv or be readable by your PC) recording programmes is a complete pain in the backside. Unlike Freesat stand alone boxes, you have no facility to find a programme in the planner and hit record or 'series link'. Instead, you have to remember the channel number and day/start time/end time and manually enter these from the timer menu. For me, this is a major fail, as I really didn't want to have to get an external box, but if you've been used to a sky box, you'll find this method of recording shows positively 1998. When I queried it with Panasonic, they told me that Freesat had imposed restrictions on the software functionality. So if you think you leaving Sky and are buying this TV to avoid an add on box - think again.
Under the right viewing conditions (angles) and with careful setting up, you will get a truly fabulous picture, particularly with 4k sources, but the Freesat integration is poor and some of the apps don't work as well as they do on other devices. Netflix only passes through vanilla DD as opposed to DD+ which is also either an oversight or a restriction put on them by Netflix themselves. A shame. On the advice of Netflix, I also periodically have to unplug and restart the TV to get the Netflix app working properly.
I'm still a huge fan of the TV, but it's 'good' overall when it really could have been great.
Panasonic TX-65CX802B User Review
Great Monitor - So So TVReview of Panasonic TX-65CX802B tv by 90215, May 21, 2016.This item was purchased for £2000 from John Lewis in 2016. The reviewer still owns this product.
Contrast/Dynamic Range/Black Level9
2D Picture Quality9
3D Picture Quality9
Picture Quality Out-Of-The-Box7
Picture Quality Calibrated9
Ease Of Use6
Value for Money8