I'd get an IPS. Better color, better viewing angles, not that much slower in response time. I wouldn't pay the same/more for a TN monitor when an IPS is available.
Thank you both for the answers but the thing is that i just have to choose one of those two... bahh
The "issue" with the ASUS one is the ghosting problems, but i seen people who could resolve and other people couldn't. And in another hand the Samsung has a good reviews.