Realism, then soundstage depth (width is easy). Also, accuracy of the midrange. I'm with Philjolet and Phasecorrect on this important point the. After working the live voices and instruments for 10 years I can't handle most speakers when listening to acoustic music. Don't get me wrong, I listen to a lot of pop and rock, but those recordings are EQ'd like mad (even if it isn't through the listening board/computer).
Speakers: What's MOST important to you?...
When you demo a pair of speakers, what criteria do you use to judge the quality of sound? What must the speaker have or do that will bring out the check book or credit card?