LoL ya'll are tooo much...but heres what I've decided to do.
Main display is going to be a mere 20g tank with aboutr 25lbs of LR. The sump will be one 29g fuge with a little section for a return pump that will push about 350gph. I'm going to have an additional 30lbs of rock in the refugium.
For flow in addition to the return i was thinking of two Tunze nano 6025's. If anything extra is needed for a 20g, I'll throw on some misc powerheads. Do you guys think with the two tunzes I'll need anymore flow?
Light is going to be a single 175 15k Iwasaki, recommended by Randy

.
Drain is going to be 1 inch external, with a backup drain for that Just in case situation. Return will more than likely be 3/4th inch into locline.
Shallow sandbed at 1inch and I'll find a way to elevate the rocks. I decided against the foam background becuase I'll probably be losing and inch or two on the back wall in an already small tank.
Salt going with your run of the mill IO.
Anything I forgot? I might actually put in a DSB in the fuge

, when I figure out how to set it up properly so it's actually beneficial.
-Kris