Monitor for Triple Screen set up

I have a Samsung T240 (http://www.newegg.com/Product/Produc...82E16824001280) and a HP LA2405x (http://www.newegg.com/Product/Produc...scrollFullInfo).

I like the Samsung in the center. So should I get another HP to make it symmetrical or get a Asus VS24AH-P (http://www.newegg.com/Product/Produc...E16824236331)?

I'm leaning towards the Asus and if I do choose that one, I'll use it as my center monitor.

TL;DR:

HP LA2405x T240 vs. Asus VS24AH-P for third monitor in non-uniform triple screen set up.