Hope this helps...Email me privately if you want the divemaster's names I liked.
The divemasters there ofetn have people getting crushes on them 
he he the brac reef divers crew are great guys ... Martin the big SA guy in charge is a great guy and he has some awesome people underhim. I would if I were you go to the Brac Reef and Reefdivers, you'll find you get treated more like an individual than at the Divi chain. My opinion.
I was just told by my old work colleagues (Bob Soto's Reef Divers) that after struggling post Hurricane Ivan they are moving all their assets to Little Cayman and Cayman Brac and giving up in Cayman. That means the Name Bob Soto's one of the best known and longest running commercial dive companies is gone
I have dived and worked with them so many times, what a history to loose. It is owned by the same guy that owns ReefDivers and hence he is going back to concentrate apparently on the sister islands. I am sad for that.
Anyway .. Brac is a nice place to stay for diving .. Although most would admit the Little Cayman Diving is better, but you can normally dive both islands from either place. Enjoy the Destroyer 