Adding 'companions' for established fish

Hi all, still in the process of moving my reef from my 45 to my 220g, and having the patients,("Practicing to have patients at least."), to do things the right way. With all this extra room I now have, I'm interested in the LONG-TERM happiness of my guests, and after hearing Paul and others talk about their fish mating/breeding, and other wise just having social companionship with their own ilk, I was wondering about adding mates for existing fish? With all the extra room I have, and all the nooks and crannies in the reef, I'm figuring it would be O.K. to go ahead and add another of each kind of fish, and they'd have plenty of room/hidding places to seperate if at first they didn't take a shinning to eachother. Does that sound like I'm on the right track, or any suggestions on how to introduce perspective mates? Help and suggestions always appreciated,

Dave

:read:

P.S.

green clown goby

yellow watchman goby

firefish goby

Are the fish I'd be looking to get hitched.

Thanks