I almost went with the Royal Grandma. If I remember correctly, the only reason I choose the 6 Line Wrasse was because in the long run I thought it looked better. The six line are very active and constantly covering the entire tank and swimming in and out of the rocks. It amazes me what holes he can fit through.
Corals do add to the bio load but not as much as fish. You can either add several corals or a couple of fish or one of each. I wouldn't do anymore than that though to start. Then give it a week and do it again.
Looking forward to some pictures.