I would advise against keeping the Black Tip Reef Sharks. They grow rather quickly and become aggressive (far more so in captivity then in the wild). A friend of mine that owns an LFS
was keeping these in a large 2,000 gallon display and we were having some problems feeding them and maintaining the tank because of their aggressive nature.
Nurse sharks, banded cat sharks, wobagongs and bamboo sharks would all make good tenants to your tank, and because of the size you could have a few of these species. As for transport I would recommend contacting a marine biologist or a certain writer for Tropical Fish Hobbyist, though I cant think of his name. I think it's Matthew Weignright, he wrote an article on shark capture and transport. You could go over to tropicalresources.net and ask them, that is TFH's official forum.