I've got to put my hands up that in my late thirties, 60hz is about my reaction time nowadays :-(
If you have the reflexes to warrant the extra hertz, enjoy them! And that setup with the portrait monitors flanking the main screen will be sweet for working on, I used to have the outer 2 of my 3x22" on swivels so I could flip to portrait for full page on screen at one time for documents.
Well... I did put 'need' in quotes
I spend a lot of time looking at my monitors, I want good ones.