You old-world types are about to have a unique and exhilirating experience.
It's truly rare to find pure folly, absolute, unfettered rubbish. To be battered around the head by the stupidest (and I mean the stupidest) pimply-faced teenagers telling you the wonders of Bose and Sony, all the while trying to figure out where they keep the good electronics. Then realizing, "my god! these ARE the good electronics!!"
I can tell you it's really quite something. And you're about to be able to have this remarkable retail ordeal thrust upon you. Best Buy (aka best try, aka total ****) will make itself tantalizingly convenient by placing itself nextdoor to a Tescos or Sainsburys or ASDA. You'll think "how bad can it be?" A short while later you'll regret that bit of optimism. A wide-eyed git with a name tag will ask "oh you mean 2.1?" when you ask where the stereo equipment is.
The Americans do one thing well gentlemen. They ruin everything, including shopping for electronics.