i got 1440p and 4K want 1080 Tn is ok but would rather IPS/VAI'm not aware of any IPS panels at that resolution and refresh with G-Sync unfortunately.
Do you NEED IPS? What's wrong with 1440p? VA might be a good middle ground.
The Acer Z271 might be worth looking at.
i got 1440p and 4K want 1080 Tn is ok but would rather IPS/VA