Mike, i can't seem to get a hold of the Cooper line. Have you found anyone specific who is carrying it yet? i have only seen it at an Expo. I have spoken to various people at Cooper and so far i can't find any distributors who carry it. The do look very nice but i would like to test some of them out.
The vizia line has been the best i have found so far until i saw the Cooper line. Aesthetically the Cooper line looks great but i am not sure about actually trying them out. having the dimmer as a 2nd toggle is much better than the built in ones from what i have found. clicking noises on some of the lines are annoying too, especially on 15amp switches. Another thing I found is the 4zone controller from vizia has rocker switches instead of push buttons like the scene controllers from vizia and cooper. i prefer the rockers over the push buttons for 2 reasons. 1 - i can just hit the rocker left or right for on/off instead of having to push a button possibly twice just to turn on/off. 2 - i can manually dim.
vizia's line is nice if you don't mind the decora rocker style they use. they make a small click on the regular dimmer/15amp when using them but nothing as annoying as the intouch 15amp switches.
you also might want to check out leviton's acenti line in Q1 08. they will be adding z-wave to that line too. they have a unique style.
Be sure to check out the new stuff from Cooper before you make a final decision about Vizia.