I voted # 2 I bought all my fish and put them in my display tanks if I had bigger tanks where it would almost impossible to catch with out ripping down a tank I WOULD quarantine but only a couple weeks. I think quarantine puts more stress on a fish going from a reef setting to a bare glass box IMO

they are in a glass box at the fish store and it would be less stressfull for a fish to be alone rather than have other fish harassing the new fish untill it has regained its strength.