Where s the best place to buy electronics in Ireland or online that ship to Ireland?

I've been going crazy since my headphones broke, a decent two year old pair, too. I need headphones cause I need to study and I'm a student who is keen on staying on budget. IIm from the US so things are not that badly priced, but I have a very very difficult time finding a decent pair of headphones for immediate purchase for a reasonable price. I have tried numerous times to get decent quality headsets but have no success. I'm looking more for legit good in ear headphones from a good well known maker. I don't have good experiences with generic, regular earphones like the ones that come with iphones. I'm looking for something better, I listen to a lot of recorded lectures and those kind won't cut it.

My 16GB Iphone 5 only has 11.7GB?

On my Iphone 5s thats supposed to have 16GB only says it has 11.6 GB in storage.
I'm currently on IOS9 and its been this way since I got my phone. Currently I have all my space used up (0 GB available, 11.6 used) Is there a way to get the other 4.4 GB?

What case should I get for iPhone 6?

Do you know if there are any good leather cases that give a lot of protection and also incorporate silicone protection around the edges of the phone too? I have also been looking for one that will also act as a small stand too but I think that may be pushing it. For now just a case with good protection is my main goal.