Help me decide

[Skimmin]

I'm in the middle of designing a new tank. I'm going to have it dividing my kitchen and living room. I'm not too sure of the overall dimensions yet. I have it narrowed down to 5 or 6 feet long, 24-30" wide, 20" high, eurobraced, 3 sides starphire. I'm trying to decide on whether I want a center overflow or a coast to coast on the short end of the tank against the wall. Also... how far from the top of the tank not including the eurobracing should I have the weir of the overflow? I was thinking 1/2 because I'm not planning huge flow to my sump and the eurobracing would also add another half inch of height too. I would like the tank to be as full as possible without the danger of an inevitable flood. Any recommendations or thoughts would be appreciated.