Hey... I took an acoustics class taught by Dr. Bose (yes... same guy)... and it was GREAT!!! Learned a lot... it was a lot of fun, and we got a Bose plant/factory tour.
THat being said... I don't much prefer the Bose sound. THe quality is VERY good (I saw some of the speaks for the base cubes being made...), but the sound has to fit your tastes. ANd, depending on the room you have, ANY speaker, Bose or otherwise, could have frequency response problems. I would suggest experimenting with a few different pairs if possible. You can buy Bose from Circuit city or whereever, and try them... if you dont' like them.. take 'em back.
I think Bose are a bit pricey for what you get... but then again, that place is a huge R&D shop for other acoustic/electric motor projects... so they have to support themselves somehow.
I would suggest what some of the others ahve... look at Paradigm, MONITOR AUDIO(great speakers... they have some new bookshelves that should be in yer price range), Energy, Definitive (if they have bookshelves... can't rmemeber). I personally would stay away from Klipsch... but that is becuase i don't like the HORN tweeter sound.
Best to you in finding speaks. Try before you buy... and it is important to try at YOUR home... becuase stores' rooms are set up optimally, or there are other crap in the room that will make the speaks sound different than in your room.
*EDIT* -- I will say that Bose has one of the biggest "bass machines" (as I call it), called the Wave Cannon. Very cool looking and impressive. IT houses a 12" subwoofer... and it has a 4:1 (maybe 3:1... that was 5 years ago) ratio (front:back) waveguide that is a total of 10 or 12 feet long. When they played that thing in the Ice Cream shop on MIT's campus, you could hear it a good distance away.