OK, finally a 60Hz 4k monitor with a nice stand and vesa mounts~ PB287Q
My setup -- late 2013 macbook pro running windows 8.1 and 10.9.3 --
it took a bit of fiddling to get everything just right (WTF is vividpixle, text looked terrible until I turned that off).
no screen tearing and at 60Hz there is no response lag. 4k streaming is great but of course you can't really tell the difference at this size.
I have no games to play so can't really say much about that part of things.
Side to side viewing angles are great with no color distortion. viewing angle from above is just fine. from below, everything gets a yellow tint but text is still readable.
Ask me questions! I will put it to the test for you.