Just though I would wiegh in with my opinion. Live rock is the most esseintial piece of a reef. It sets the aquascape, the look, the feel, it really makes the tank either look like a fruit stand, or a reef with caves and crannies. I think quality, porous, pretty, and open live rock is worth the extra cost. I paid alot for my very large islands of tonga branch. The two islands on the right are each on piece of rock. The one on the left is two pieces tied togther. The bridges are made from one piece and the other from two pieces. Dave wraped them in double layer of bubble wrap, and the stuffed in packing peanuts when they were shipped. I really like this rock.