Welcome to CR, your starting out with some nice stuff. The people here can lead you better than I can about what you will need for you fuge.

Clean up crew is all dependant upon what you like to see. They suggested to me to start with some turbo snails, astreas snails, ceriths snails and get yourself an urchin (best purchase I made by far make sure he's reef safe). That size of tank I don't know what the numbers should be. So I'm not really helping you much. I started out with a small number and had to increase because I have MH lighting and they weren't keeping up. Each tank is different dependant on the load. Personally I would stay away from crabs if you are going to do a reef tank. Not only do they only pick at the dietris but they eat the coraline aglae too quickly and they have been known to kill a snail for it's shell.

Good luck and there are many knowledgable people here so ask away.

Angie