As a sage healer I do not limit myself to only support role - sages can perform any role in a raid group perfectly. if you can not main heal in operations, you are doing something wrong.
Here is my stats: http://img822.imageshack.us/img822/6881/sagewf.jpg
Not BiS, but as you can see 9% alacrity does not impact my surge rating too much. I like to be able to cast faster, and faster casts are crucial in NiM EC. With 0% alacrity you get extra 50 healing from every Salvation critical tick, but you lose versatility and limit your movement.