Trinity bars removes all of the wow art framework like the griphons, and completely replaces all of the original attack bars and side bars.
You can adjust the size, orientation, and position of all of your bars as well as how many buttons they have.
I would advise against drasticly altering your interface though. While it's nice when everything works, every patch day you are going to be cursing life when you have to re-learn how to use the old interface until your UI is patched current.
I used to go through the trouble of making a slick interface but it's too messed up with constant patching to bother fixing it every time. And once you get used to your buttons being in a certain position, the game is almost un-playable when you're forced to go back to the default ui. So I just use the default ui all the time now.