Aquascaping ideas

[Oxymoron]

Keri I really like your prop0sed layout.
Perhaps I will try to build some caves and overhangs on either side but also leave a large space in the middle for the fish.
I now have approx 170 lbs of 4 different kinds of live rock to work with.
Im away working so I havn't seen how full the tank is with all of it in but I am almost certain it will be too much.
By having 4 different sources of liverock in the tank will I have a good biodiversity of little critters?
Is 4 enough or should I look to trade for additional sources?