I will second the reccomendation for Bluewater Divers.
Their boat can take 10 I believe, but they rarely take more than 6.
The even took me to the Duane once by myself, when other people no-showed. I think most ops would have canceled, Instead they took me & Brent gave me a Great tour of the Duane.
They are not the cheapest, but I promise you they will earn their fee.
Whoever you chose, make sure you dive the Grove, If you are into wrecks, and qualified for 100'-120', its an awsome dive.
I am going back next week to see it again myself.
Dive safe,