Yes, there is a (good) story in K-On. Don’t even try to disagree with me, my opinion on this subject is law. Deal with it.
There will always be a battle between the weeaboos (myself included) as to whether or not American anime importers will ever have a good dub. There are some shows that really are good when dubbed, but there have been far too many series that had terrible voice acting…need I mention Tenchi Muyo?