i planing to replace my 6 year old Viewsonic vx2336s... planing on dual monitor setup..

eyeing on viewsonic vx2476-smhd mainly because of IPS screen. but this monitor should be not much upgrade compare to my existing monitor right??

another option would be VX2458-C-mhd...
for this monitor i understand is a VA panel, the color not as good as IPS.. but it stated 85% ntsc so i assume the colour would be as sharp as IPS?
another question will be will it weird for setting up dual curve monitor?

Will acer xf240h a better choice? consider a 2015 model...

im in penang.. does any shop have display for viewsonic i can feel my own?