How many speakers are you looking for the $400? If two, you have a lot of options. I would say that the klipsch sunergy speakers you have listed are not even in the same class as the B&W, axiom, or ascends. The JBL's are towers, the qunitets are tiny sattelites. These are all different types of speakers. Can you listen to any of these before buying? If not, I would listen to the internet only one's first, because of their return policy.
Also, if you are only buying two speakers you need to consider speakers that go pretty low. Either bigger bookshelves or floorstanders. I just bought some phase tech bookshelves, and although they sound phenomenal, they are pretty thin in the low end without a sub.
So let us know how many speakers you are looking for and what you have listened to.
Pat