i agree with hermitcrab. Initial health of livestock is always very important. For me, i think henry@Marinelife has very good supply of livestock. So far disease free. Jir eh marine also not bad, bought alot form them so far, no disease. But i have to say those fishes at farms, usually got carry disease... For me i find that the standard at farms are alot different from LFS. Usually if i go farm, i buy corals, and not fishes. Fish i buy from LFS. Just my point of view.
However, if u practice quarantine and good measures, doesnt matter where u buy from. Just that if u like me, dun quarantine, then the initial health of the fish is very important. Make sure it has no disease