I had a friend just get a 240 gallon with all the bells and whistles. the closed loop was on each corner of the tank and the over flow was in the center of the tank. He custom ordered his tank all glass. On the closed loop he added a 4 way for circulation. his tank is awsome. when you look at the tank, no matter what side you are on all you see if reef. he stacked rock up around the overflow to hid it and with the closed loop, he hide the pipes with smaller rocks. tank looks awsome.
He is using a 55 gallon sump and I can't remember what skimmer he got but it is like 3' tall. I wired the thing up for him with a timmer on each plug so he can control all the power that goes to his tank. with the auto fill system he put in, the only thing he does is fill his water with salt. We also made a lighting system for the tank that would make mother nature jellious. with the timmers I installed his lights mimic natural lighting process.
Good Luck with you new tank and don't forget to post some pics for us when you start it.