I'm seriously tempted to get a Hisense 49" 4K screen. You can get them for only £350 these days but I do think that's just a tad too big.
I was looking to purchase a 43" philips bdm4350uc but it turned out to have burn in issues. So I started looking at the dell p4317q, turned out to have the same problem. I was then going to buy a 43" hisense when i spotted a 48" Panasonic 48CX400B to be precise in Tesco.
The hardest part about buying a TV for a monitor is apart from Samsung models, very few have been tested by users or companies and have data online regarding input lag, chroma support etc.so Tesco with their return policy seemed a good idea. Please note: different products can have different return policies!
So it looks like I hit jackpot! I took the chance because it was 3D 4k. I decided that being 3D it would need to be pretty responsive and support 4k@60hz (some may only be 50hz for example.)
On opening I found something most companies do not include anymore and I applaud panasonic for this:. A system schema of the driver board. Smack bang written on it:4k@60hz in 4:4:4.
Input lag was abysmal though until i put it in game mode. A few tests so far find it to be about 20ms which is very acceptable to everyone except possibly the twitchiest of competitve players.
The size however does present one problem and it's why i will recommend not exceeding 43". At 2-3'away a handful - and i mean maybe 6 pixels - on each side are bored at such an angle they diffract slightly through the glass. It kind of gives it a samsung galaxy edge look, which is no bad thing but you may not like it. It's either scroll bars or nothing of interest drifting in these 6 pixels so not often a problem but for some it will be annoying.
Apart from that i am loving it. I use display fusion and have set profiles for a 2x2 1920*1080 arrangement, a full 4k screen and a bordered ultra wide 3440*1440.
Genuinely, the versatility to do all of this surpasses all other offerings and is far far cheaper than a reasonable ultrawide. On reddit there seems to be a love affair with ultrawides, many sneering at 40"+ 4k. They have no idea what they are missing, especially if you use process like Excel, SQL studio, Visual Studio etc. Like i do