don't forget some absorbtion treatment for your room, monitor choice is only half the story (if even that). If you do have room for something (something is much better than nothing in this case), google Ethan Winer. He is some kind of acoustics god and shows how to make cheap sound absorbers.

We put an article up on the site as well with a few photos, the difference the treatment made was amazing.
http://www.quantizecourses.com/pages.php/?cat=16