I have my current and favorite dps spec, here:
http://www.wowhead.com/?talent#sZEMzZVfrxrIuhdIfsu
And the one I was thinking about doing, here:
http://www.wowhead.com/?talent#sZEMd0bZVfbxbIuhdIfsu
The only difference really is that I lose Vindication, which you cant use against bosses/dont need for trash anyway, and the survivability and 1 min sacred shield would make my life so much easier, and 10% divine sacrifice is good tank cooldown.