I personally like Gulf Rockt he best .. even if it does harbor those horide killing Mantis!!!.... I love the life, I mean, you get a rock... with MACRO ALGAE, several kinds btw: also, you get BEAUTIFUL SPONGES like Red and orange finger and ball sponges... also AWSOME feather duster, and WAYYYY better coraline growth than figi or caribean.... coraline that is Deep purple and red and orange.... coraline that grows thick and far!!!... you also cant beat getting FREE CORALLLLL HITCHHIKERS!!!... like Lace coral, galaxia, Brains, plates, bubbles and immature Favia corals... also the red reef corals like... well im not sure theirrr names... Ill get back to that! lol, and you also get awsome hitchhikers like small snails like welks and naisarious snails (spelling?) also you get hermits sometimes, as well as slugs... some not reef safe and baby starfish that are reef safe... I have even got sea squirts... they will survive if you give them food like Phyto... YOU JUST CANT BEAT THE STUFF!!!
but thats just me, and if I couldnt get THE gulf rock I would get aquacultured... or figi... or tonga, but it has to be someee more kind of BANGEN' looken rock!! IF YOU KNOW WHAT I MEAN !!!
well.. thats just my 2Cents worth... good luck picking rocks!