Gosh folks, there is really a number of mis-conceptions in this thread.
First, my (minor) claim to fame in this regard - I did actually work as a recording engineer in a professional music recording studio.
For "studio" monitors, you usually have a pair of "mains" - big speakers capable of very high output without distortion, carefully engineered for flat frequency reponse and phase matching between woofer - mid - tweeter. Typically the mains are 10-12 feet from the engineer's chair behind the mixing console.
You also (almost always) have a pair (or two) of near-field monitors, typically placed on top of the mixing console, and about 3-4 feet from the engineers chair. The near-field monitors may or may not have a flat frequency reponse. For a small home studio, near-field monitors will probably be the only monitors, so it's more important that they have a flat frequency reponse. For my previous professional experience, our near-field monitors were Yamaha NS-100 (I think), not because they were great, but because they represented a kind of "normal" bookshelf speaker that people might use.
When performing a final mix of the tracks, it's critical to check the sound quality on several different speakers and in mono as well.
I've heard that a lot of people use (and like) Genelec monitors, and I looked at the Adam 7 link, and those look real good also.
I'm into DIY speaks, so I'd advise this for near-field:
http://www.audioheuristics.org/projects_gallery/ER18DXT/ER18DXT.htm
And something like this for big mains:
http://www.htguide.com/forum/showthread.php4?t=26309