You should be fine with something cheap, like this. If you don't mind spending a little more cash, then this might be a bit more reliable.
I prefer to use an installed card over USB dongles, but that's up to you. Your distance isn't that large, but you could have some trouble with the obstacles between the computer and router. How does your laptop do at the new computer's eventual location? Use that to determine if you should get a cheap one or spend a bit more money.
The thing's 6 years old.