I bit the bullet on a Viewsonic 4K 32" XG320U for just under £1K. It fits most of my needs and get good reviews for the areas that are important to me.
Happy with HDR600 spec
150Hz
4K
Freesync Premium Pro
Good colours for content creation.
OKish for ganes and HDR
I don't need high response times as I don't competitive game but wanted a monitor that works on my PS5 and PC.
Just giving an update on my initial reactions to this monitor.
My main use will be for productivity with some gaming.
Refresh rate and SDR gaming.
I find it has decent response times for casual gaming and saw no obvious ghosting. Though I did come from a 60Hz 4K IPS Samsung U32E850R. So for casual gaming it seems perfectly fine and the 144Hz refresh is excellent.
SDR
I did have to adjust the RGB manually as the out of box sRGB setting looks too green and reds look pink. I ended up on Red 90, Green 80 and Blue 100 and saturation 50. For a monitor that is touted as perfect out of the box for sRGB etc, I just don't see it and it looked very wrong. I will get it calibrated but it looks fine with these manual settings.
HDR
This is only rated for HDR 600 and has no dimming zones and you can tell when using HDR content it is not great. It is good and certainly shows an improvement in colours and contrast, so HDR does make a difference. In night scenes the lack of dimming zones is major negative, because HDR in night scenes it gives more colour range but suffers from lack of contrast. Still better than SDR but not massively so. HDR in windows is just about accepatble and definately an improvement over the HDR400 monitor I tried a while back.
I tried HDR in Watch Dogs Legion, Far Cry 6 and Horizon Zero Dawn and there is a definite improvement in color range and contrasts. Just don't expec miracles as this is not proper HDR with no dimming zones. So day scenes are good and night scenes are only so so but still better than SDR mode.
HDR in Windows 10 is a pain, some games need HDR enabled in Windows 10 and to be honest Windows 10 looks poor in HDR mode. It is either too bright or the contrast/colours look wrong. So PC game developers really need to be able to toggle HDR on/off without the need for Windows 10 being set to HDR mode.
Conclusion
I saw no excessive IPS glow and have detected no dead pixels. Blacks are about expected for IPS and I have no real complaints here. I have tried VA and while blacks were improved I find IPS much better for general use. Overall it is a good 144Hz 4K general use monitor with good size for 4K content and it does an OK job for HDR.
So if you are looking for a general purpose 4K IPS with some HDR capability it will be a decent purchase. If your main reason is HDR then avoid. It is better overall than the monitor it will replace, so I will be keeping it.
If all you need is 144Hz 4K then get a cheaper HDR 400 model and ignore the HDR content. If you want better HDR content then you need to spend £3K here in the UK and that's a lot for what is essentially a niche feature.