I just recieved two of these and seems pretty good (shipped yesterday). There is no color difference between the 2 units and no dead pixels either. It is using the same Nano-IPS panel as LG 27GL850 which is still NZ$900+ here, but downside is Dell does not have sRGB model while LG does.
I don't think there is any QHD 165Hz IPS from a good brand at slightly above NZ$400 so this will be a good deal.
Bought this from the recent deal. Great value, but the HDR is so so.
First one I got was DOA, and half the left screen was displaying bright green/pink pixels even if there was no input detected.
But dealing with Dell was straightforward, and they shipped a replacement straight away and organised pickup of my defective one without delay.