Nice! May I know why you chose those dry rocks instead of Caribsea purple live dry rock? I am thinking of using the Caribsea rocks so that I get that purple look right away.
Also, I am thinking of removing the black film on the back of the tank except the overflow right away. How do think we should mount the wave makers and limiting the view of the cables when the back is clear?
So all of that rock that you see is actually live rock that I've had forever. It was all originally live from Tonga and Fiji. There's only 5 separate pieces of rock which will give you an idea on how big they are. I'm using those due to their interesting shapes and perhaps because I'm a little sentimental about the dead rock. I mentioned before that I can see the old colonies of my tank before it wiped out.
If I were to start from scratch I very well may have gone with caribsea, but I've used Marco in the past and they are available from BRS where I bought my tank and the majority of my equipment.
My last two tanks were 6 feet and 4 feet... This is my first 3 foot tank in awhile and I overestimated how much space I had. As it stands I will use very little of the marcorock in my tank, maybe to build some shelves as @thaistalyn suggested or just as filter media in the sump or refugium.