I'm using the DisplayPort on the ASUS PB287Q directly to my in , as I've been working with that GPU lately, writing some articles in our Tweakipedia section.
To sum things up quickly, I'm in love with the ASUS PB278Q so far (besides missing 120Hz), and I'm sure I'm going to love it more as time goes on.
Firstly, this purchase of mine of the ASUS PB278Q is for my everyday monitor - for the added desktop real estate. Secondly, I chose this monitor because it goes into portrait mode. Thirdly, I purchased this monitor for some crazy high-res, multi-monitor, multi-GPU articles that will arrive in the coming weeks and months covering AMD and NVIDIA GPUs.