I've got to say the extra fidelity at 4K is incredible, I ummed and ahhed for a good month before taking the plunge, considered whether the £500 would be better spent on a GPU, not even close, frames are one thing, the experience is quite another, no amount frames can replicate the immersion or absolute splendour of 4K. The textures up close and at a distance are mindblowing, I had a very nice 1440p monitor (AD27QD) for 4 years and I was very happy with it, but this Xeneon is something else, the brightness and color gamut are amazing, everything pops. Build quality is superb, the stand an acquired taste, but I love it, got quite a bit a Corsair kit, RAM, AIO, so syncs in well with that eco system. I was going to buy LG's 32GR9U-B for about the same new, but it didn't have Quantum Dot as this has, or Nano like the LG 950B so that swung me towards this B-Grade. By all accounts it's not quite as good as the 950B, but I doubt i'll notice it as much as I would have spending another 30% or so.
Definitely give the B-Grade monitors a shot, nothing to lose except some inconvinience if it's not spot on, this was going back if it wasn't perfect. And the trade off you might have to make between 4K + less frames and lower settings vs 1440p + higher frames and settings is definitely worth it.
To think my orginal plan was to get more real estate but at 1440p, what an idiot, just goes to show, do your homework before you put anything in a basket.