BLINDSIDE also works GREAT and is safe for most warm season grasses, selective… destroys most weeds and really knocks down nut sedge. Its like $110 for a bottle but you can make a lifetime supply of the stuff with that bottle.
Be patient with nutsedge and be PERSISTENT - it will take a year or two to totally get rid of it assuming you have a bad infestation. Be timely with your pre-M applications also to help prevent new sprouts in the spring/summer.