I would use the omen as an overhead, and below that:
Acer - XZ350CU bmijphz 35.0" 2560x1080 144Hz Monitor - $473
Acer - Z35 bmiphz 35.0" 2560x1080 200Hz Monitor - $681
HP - OMEN X 35 35.0" 3440x1440 100Hz Monitor - $799
Good choices! Do you mean a second monitor?
The build can handle more than 1080P at 144hz with any game at ultra setting and even at 1440 at 100Hz. Ideal would be a 35" monitor that can handle 1440 at 144Hz+ with GSYNC. I got this monitor at a great deal of $350 and can handle a1440 at 165Hz.
OMEN X 35" was in consideration but it could only could go up to 100Hz and it was way over my budget.
Acer Predator Gaming Z321QU - $599
LG 32GK850G-B 32 - $614