When I started this thread I could not justify nor afford the expense of the premium Avtex TV; which was roughly the same price I paid for a 32" LED Samsung some 6 years earlier. 2 years later I do not regret that decision and would recommend Cello to anyone who wants an inexpensive TV with 12v power for occasional use.
So for the curious here is an update on my experience. For obvious reasons the Ferguson/Cello TV has not had much (read any) use this year, but 2019 was quite a good year for touring nights. We use the TV on the stand, not wall mounted due to having no suitable mounting position. So it sits on a ledge where the TV points are [by the habitation door] so from the front lounge, it is at the perfect viewing height.
Screen quality and sound are perfectly adequate for the caravan: HD channels look good, SD channels look "ok" and sound is loud enough without resonating outside the caravan. The limited PVR (recording) functions were rarely used as it appears to only be able to record the channel you are watching. Pausing works ok, but my expectations were tempered when comparing to a dedicated device. Overall very happy with it. I have even used it as a second monitor for my laptop when I 'worked from home' in the caravan.
Issues:
1) The remote control issue was fixed by a replacement handset.
2) The viewing angle: Fine if you are sitting down with TV at eye-level, but the picture cannot be seen if you standing (for example when cooking) over the screen.
3) DVD Player: We had a stay at a Caravan Club site which had zero phone and TV reception, we did not have a cable to connect to the TV point on the bollard, so watched DVDs we took with us. The player refused to play some disks and would only play half (stalled at layer-change) of others. Once again Cello customer services fixed this very quickly: they sent a courier to collect the TV and replaced the DVD unit, which fixed the problem.
With the TV now out of warranty should it break again, I may eat my words and have to fall back on "Buy cheap, buy twice" but we travel with the TV in the car wrapped in a custom made protective sleeve [thick bubble wrap and Gorilla Tape!] placed behind the drivers seat, so we look after it as much as possible and hope it lasts.