Right off the bat, unless 4k is important to you I'd cross the Q535 off the list. I'm not sure that a U series processor will handle 3D software very well, although that depends on what actual software, but it definitely strikes me as a different sort of laptop than the other two.
As far as the GU501 and the S63, personally I'd pick the GU501. The two extra cores will likely help a lot in any sort of 3D software and having a 120hz screen on a laptop sounds pretty fuckin sweet.