Best monitor for around £400 to use with GeForce GTX 1660Ti

[Steve6371]

I'm looking for the best gaming monitor for around £400. Please can some advise me which to chose.
The graphics card is a GeForce GTX 1660Ti on my desktop.

 

[mattyfez]

IPS pannel, 1440p, 120hz or better, proably a Dell 'S', 27" or 32"