When you buy a car you drive your old one to the lot. New cell phone, same.
If you wanted to take your git with you to shop for a new one, I can understand why. If the store people had a problem with it, they don't need your business.
When I shop for a new rig, I don't take my other ones. I'm pretty comfortable that I know the sounds enough. Furthermore, getting a new one that sounds the same defeats the purpose for me.