You should figure out what you want.
Personally I am not an audiophile but I think you should figure out what you like and don't like about your current speakers before you buy something new. Listen to other speakers, even mass-market ones and try to think about the many ways they differ. From this you can figure out what you admire and don't admire about your present speakers and start focusing on speakers that match what you like about your speakers while also delivering the things you miss. It won't replace listening to speakers or taking risk ordering speakers unheard, but it may help narrow your list.
I would suggest reading some of the reviews of Hsu Ventriloquist linked at
www.hsuresearch.com. I found those informative deciding between bookshelf and satellite. If you read the first two articles thinking Bose<=4" woofer you will understand some of what Bose design chooses not to do.
Also think about what a subwoofer will do. A couple friends of mine have acoustimass systems--One is always impressed by my speakers (which go down to around 40-45Hz), while the other was impressed, thought about it for a day or two, and bought a pretty decent Velodyne sub that goes way low and he is very happy with his "immersive" home theatre. Is my speaker system as "immersive"? Certainly there is a lot of cannons, explosions around 25Hz my speaker won't even show.
I don't particularly care for bose (nice looking though, was impressed with their size in the 1980's), but I don't care for Klipsch either (sounded bright to me) and a college friend who was a college DJ, musician and real audiophile loved Klipsch so I get sense there's no right answer, just what you like-- he was using Harmon Kardon amp, I think...
Side note: That friend at one point almost invented directional bass. When he tried to patent it, the patent office sent him back Klipsch's patent on the same... I wonder what he did with the massive carcass of his demo unit?!