Am i forgetting anything on the new tank setup?

[spikehs]

I'll be getting this new tank as soon as my tax refunds come back.

-36x18x18
-1 corner overflow
-2 3/4inch returns.
-1pump @ ~1000gph
-1 SCWD
- there will be 2 175w 10k bulbs over it + actinics
-dripping kalk some way, + 2 part additives.
-no skimmer (yet anyways)

I plan to put a ~5inch dsb, and have about 50-80pounds lr. I am planning on building to rock piles in both back corners, all the way to the top. Then have the 2 returns (possibly split into 3diff directions each) pointing at the piles. Maybe one side for sps and one side for everything else....I like having a nice open look to the tank so hopefully this will work. Anyone have any suggestions? i dont want to forget anything when it is too late.

Thanks.