i have a quiet one 6000 on my cube and it is divided into 2 3/4" returns and does great. Very reliable and quiet! Tank is looking great so far! What are you going for fo aquascaping? As soon as i get my second cube up and running i am going to divide my corals, SPS and zoas tank 1 and LPS and BTA for tank 2. Also not getting any other rock just going to divide the rock.
Are you going to have the rock cover your smoked overflow?

I haven't really come up with an aquascape yet... got a couple ideas, but prolly just a cavernous island table... it wouldn't cover the overflow as I am hoping the large colonies of SPS (100% dominated tank) will grow tall enough to hide the overflow .

I demand up dates!

I canceled this project for now.. Tank ended up going to my LFS to become a very nice frag tank. I snap a pic of it next time I am there

damn, too bad not doing this tank anymore!

Any ideas or threads on here with 40-50 gallon rimless reefs you know of similiar to yours?

I was shocked to see this thread got bumped.. haha

I know there are a few cubes around this size of the forum, but I haven't been able to keep up to date with them.. Sorry.

Here is what the tank looks like today... This at at my LFS as a zoa frag tank.. Sorry for the crappy pic, I don't ever use my cell phone for tank pics..