I know this is a little known brand but I thought that this was an amazing deal for a 55 inch 4K tv of this spec and having done a bit of research it seems they are actually pretty good quality too.
Product Information :-
With the UHD55B6000IS from Changhong, Ultra High Definition has finally arrived in your living room. Enjoy an image that's four times higher than 1080p HDTV quality! With 8 million pixels, you'll be blown away by the lifelike colours and details.
At the forefront of technology, this TV with a resolution of 3840 x 2160 pixels delivers 3D Active technology. Whether you're watching in 2D or 3D, the contrast is simply outstanding thanks to the UHD Image Engine processor. And with a screen size of 140 cm, LED backlighting and SRS TruSound HD audio technology, the UHD55B6000IS offers total audiovisual immersion.
This 16/9 aspect TV notably includes an Ethernet connection and a wireless interface. Besides browsing the Internet, you can also access FreeShare, Facebook and YouTube to share your favourite content. This 55'' screen also has an integrated dual tuner, so you can watch another channel at the same time!