For under 400 dollars, you can buy a 6 channel surround set of two way bookshelf speakers for your surround set up that will not only surpass Bose(a rather trivial feat - as Bose is all marketing and little actual performance), but will surpass most 'real' speakers also, in a particular budget range. The speaker is the Behringer B2030P, and you won't hear it mentioned much if at all on home audio forums, as it's a pro audio monitor. But I have analyzed/measured and compared this extensively with a wide range of available home speakers of similar type, and the B2030P at 130 dollars per pair is superior to all(that I know of) home two way speakers in regards to the measured parameters that actually relate to perceived audio quality until you get to a much higher price range(>4x) where you can just start to find some comparable and/or better speakers if very carefully chosen. Of course, you still have to add a subwoofer, these speakers are for the mid-treble ranges only. Like most things, these Behringer speakers are not perfect. There is an air leak that should be fixed to prevent a rushing noise sound at high SPL and a part inside that a dab of super glue can be used to prevent a potential vibrating/rattle sound; these are both extremely easy fixes that anyone can do in 10 minutes.
-Chris