Klipsch will get you there. Try the Klipsch reference series. Here is a link to the architectural (i.e. in the wall) series. They start about $350 a pop for the small ones.
http://www.klipsch.com/architectural-speakers
That will get you started. If they are for music I wouldn’t put them in the wall because the speakers are not going to be as good as free standing models however, I understand the space needs so not judging you...
If price is truly not a concern consider going up to Krell or Bowers & Wilkins.
http://www.krellonline.com/modulari_ion.html
http://www.bowers-wilkins.com/Speakers/Home_Audio/CM_Series/CM9.html
As far as price if you have to ask you can’t afford it. I CAN’T afford it by the way... but I have heard them. I run Klipsch and they are good enough for me.
The other thing to consider is your music source. If you are running MP3’s then I wouldn’t consider anything above the Klipsch anyway. You will not be outputting anything the Klipsch can’t handle and the anything above that without converting to FLAC is just buying so you can say you have them... Just my unpaid opinion...
Klipsch are pretty awesome. And, yes, free-standing speakers, unless you want to hear what your wall sounds like. Unless specially-designed, not very good.