I think the best
advice is to move into a place that doesn't suck.
If that's not an option, possibly due to your poor performance on walks etc, to make the best choice you need to know the situation. Is the wireless dual band? N? G?
Once you know that stuff, go
here and choose the one. If you don't know, then you are probably safest choosing one like
this.
I wouldn't limit it to USB though, unless you don't have an open slot in your computer.