I'd be more inclined to go for the Sammy.
There's a discussion on the Sammy panel over at
overclockers (be prepared for a long read though lol) There does seem some concerns though from certain quarters, as Samsung seem to make 2 versions of it, which you can read about in that thread.
There's also an article
here on the subject.
I'm not sure about the Asus, but from a personal point of view, I've found Samsung panels to be very good.