What is the best for Warrior
 

Just looking for a nice setup for a warrior. Kind of easy to use and if possible be able to switch stance by just clicking on action button....example...I'm in Battle Stance and want to Taunt a mob so I just hit the Taunt action button and it auto switchs me to Defense stance.

you can do it with an easy macro that has been posted in a nice thread about macros in the blizzard USA warrior forum.

however, i always managed to do it without any macro, it's all a matter of how you displace buttons and keybindings