Monitor resolution for Adobe Suite especially After Effects.

Hi gang!

I’ve been working on the 3D animation and Motion Graphics field for ages. Believe it or not, I’m still using my dual Dell 24” 1080p monitors from ten years ago. These are actually LCD and not even LED! lol. I think the monitors are 2408WFPb monitors.

Anyway, the time has come for an upgrade. I want to get a set of 27”.

I’ve ready many times the Adobe Suite doesn’t play nicely on 4K and everything is too small to see. As such, I am leaning towards a 1440p which is in between and allows me to see a full 1080p image onscreen with some additional space for the interface. However, I also don't want to buy a monitor with a resolution that will be obsolete in a year or two. So I'm torn between the two.

Color is very important! Specifically to be able to see a full gamut with deep blacks and bright whites.
I like Dell. For color, I’ve been told some of the best are the Dell Ultrasharps and the BenQ monitors. I know they should be IPS panels.

Last but not least I guess the budget I’d like to keep it at is around $300-$400 per monitor.

Do you experiences folks have any recommendations? In specific, I'd like to hear from someone who has used BOTH aa 4K and a 1440p with After Effects. If you've only used a 4K and tell me it's great, that doesn't answer my questions because you have nothing to comapre. Likewise, if you've only ever used a 1440p monitor, you're in the same vote. So I'd like to hear from someone who's used both.

Thank you in advance for your help!

Rich