Like many other respondents here, I'm also wondering why you would want to pursue bookshelf speakers for a room of those dimensions, assuming you want to fill that room with good sound fidelity. Esthetic concerns? Life partner sensibility concerns?
Anyway, I'm not terribly familiar with your core components. As such, here is a brief list of speaker brands that might fit the bill in the 5K (or thereabouts) brand new range: Revel + OHM + Dynaudio + Monitor Audio + B&W + Focal + Kipsch + Wharfedale + PSB + Paradigm. For a room of those dimensions, I've always been impressed with Revel, OHM, Klipsch, Monitor Audio, Focal, PSB and Paradigm. However, only our ears can stear you in the right direction. Go do some critical listening in an environment(s) as similar to yours as possible. Good Luck!

