I've used Permit. very good post emergent nutsedge control. You want to let the nutsedge get some leaves on it to absorb the herbicide for best kill.
If it's legal in your area, I'd look into Dual (metolachlor) for pre emergent nutsedge and grass control. pretty sure it's cheaper, don't have to worry about adjuvants, and you can still come back with permit later if necessary. it would also take the place of the pendimethalin for annual grasses, and without causing lodging.
We can't use Dual anymore here on LI since they found it in the groundwater.