closed vs open headhpnes?

The main concern I have is sound leakage with open headphones, how much of a problem would this be since I will be living in a dorm room with a roommate? Three models I am considering are: Shure SRH440 (closed), Sennheiser HD280 PRO (closed), and Sennheiser HD555 (open). I notice a lot of people on this forum recommend the HD555, but would these be better than the other options I listed? Do they sound better from being open rather than closed?

Also if it helps, the things I will use headphones for are: TV, movies, video games (xbox), music (mostly metal) from ipod. I plan to get the fiio E5 amp as well unless someone has a better idea.

Open headphones actually let alot of sound out and in. I have the AKG 702's and they do let quite a bit out, halfway with an amp(which is pretty loud) i can hear quite clearly even the lyrics

Avoid the HD555 then - it leaks a lot of sound at reasonable volumes.

I've had quite a few headsets over the years but the Sennheiser PC360 I have now is probably my favorite out of them all. Great sound and comfort and due to the open design my ears stay a lot cooler too. Just buy your roommate some earplugs to counter the leakage!

Where ambient noise level is high, closed headphones are better.

Where the room temperatures are high, open headphones are better.

In case of both noise and hot temp, it all depends on if you prefer sound quality or comfort.

In a perfect environment open headphones are generally better.