FYI- I know its easy to recommend B&W but I still want to let you all know these speakers are just amazing. I just installed a pair in my den/ library- in a 2.0 system. These speakers might seem expensive at ~$2800 but in fact they are bargain. They could charge 2-3x the price and they would still be justified. they are paired with an Onkyo Integra receiver that has ~120 watts per channel. Nothing fancy. No sub woofer-just clean clean sound with very clear and yet still feelsome bass. Highly recommended.
http://www.theabsolutesound.com/articles/bowers-wilkins-prestige-monitor-1-loudspeaker-tas-222/
http://www.theabsolutesound.com/articles/bowers-wilkins-prestige-monitor-1-loudspeaker-tas-222/