Are you definitely staying for only the year? If so bringing the PS3 to play old favorites/local multiplayer from time to time seems like the way to go. The year will go by pretty quickly and it would be a waste to spend a too much of your time at home playing games. You can always catch up on PS4 releases when you get back.
Also suitcase space becomes very precious when you're packing for the year, and having things shipped overseas can be pretty expensive.
Yeah, that's why I keep saying I probably won't have the time lol, and why I'm seriously thinking of not even bringing any of them and stick to Steam and handhelds. But if I bring one, PS3 is winning. Also, I am staying for a year - for now, since I have a 1 year student visa. If I stay longer will depend on what happens near the end of that year.