I had the same problems as the original poster, it is hard to find a good clean UI for dks to use and feel comfortable with... I entered up engineering an compilation using SpartanUI, its not pretty nor is it lightweight but it gets the job done for me anyway.
You can check it out if you want:
http://www.wowinterface.com/download...llanrusUI.html
But I won't exactly say use it, more along the lines of test it out and see how it feels for you personally as a player. :P Lol