PC version but I have no clue which problems you are talking about and if that has something to do with especially the PC version so maybe it will be the worst version at release. Didn't follow the game too much the last days.
PC version has the cheapest price and best possible graphics and/or more frames to get a better overall feel of the gameplay (yes, I know that the average Steam PC won't be able to beat the PS4 version but who cares about the average if we talk about the possible best).
If you really care about the few minutes of extra content it should be the PS4 version but I never felt as if the extra content in the Ubisoft games were of any importance.
Wii U Gamepad is nice and all but I don't find the extra display very important but other people will see that different so that it's all a question of preferences.
