The whole walking into the store thing is overrated. I tried to swap a Monster Cable not long ago that developed a short. It was a 12-footer with an L-shaped plug on one end. GC doesn't carry them anymore, so they couldn't help me. Sure, I can contact Monster and pay money to send it in, then wait for a few weeks to get another one back. That's not convenient at all, and only adds expense to the already ridiculous price I paid for it on a whim a few short years ago. In the end, this cable was no better and lasted no longer than any other cable I've had.
So in short, don't bank on being able to run in any GC and get a new one when yours breaks.
So in short, don't bank on being able to run in any GC and get a new one when yours breaks.