I have a pair of PMC IB2 SE in a 11 1/2 by 18 foot room with 8 foot ceiling. It took me a while to add appropriate absorption and diffusion and dial them in. They are toed in to meet just in front of the listener and that brought everything into focus. Yours being 14.25 by 17.5 and high ceilings should be much easier. I am not sure what model you might try in your price range. I found that synergy between components was also key to optimizing the IB2's but speaker placement/aiming trumped all other gains.
