If you want fast response times, then IPS would be the better choice. IPS is the undisputed king for most gamers. Another thing to consider is the brightness of the room you are in. Any office or a home with an open window or overhead lights will make a huge difference.
For increased productivity and multitasking, a three-monitor setup generally offers more benefits than a two-monitor setup, providing a larger workspace to distribute tasks and reduce distractions.