A very interesting reef safe wrasse...they can bother smaller fish and will munch pods. I've seen them eat worms....plus they will accept most flake & meaty foods offered. They are for the most part peaceful...spending the days darting in and out of the reef looking for bits to eat. A good choice especially for a larger system such as yours...a note of caution though...they are jumpers...mine went carpet surfing one too many times!
Can't vouch for pairs of them...but more agreement on them being just fine (if not good) in a reef. I just got one last week and couldn't be happier with it. One of my friends has had one in his 90 from the beginning--it's a great lil fish.
Someone near me has 2 in a 180 - he says there are no problems with them.
But yeah, they'll get your pod population down in a hurry. Another guy I know says his 6-line eats those baby brittle stars, pulls them out and plays with them...