You're going to get pretty different answers. For me...I'm much less interested in shape and porosity as I am interested in biodiversity (life on/in the rock) and environmentally responsible harvest.
So...you need to figure out what you want your aquarium to be and find the rock that meets your specific needs. There's no single "best" way to do things.
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400 gal reef. Established April, 2007. 3 Sequence Dart, RM12-4 skimmer, 2 x OM4Ways, Yellow Tang, Maroon Clown (pair), Blonde Naso Tang, Vlamingi Tang, Foxface Rabbit, Unicorn Tang, 2 Pakistani Butterflies and a few coral gobies
My Tank: http://www.canreef.com/vbulletin/showthread.php?t=28436
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