Hex Reef??

I was thinking bout doing a hex reef tank but i have a concern.  Would it provide enough swimming room for certain fish.   I was thinking of trying to do a center overflow return so it would be a 360 degree view.  Not sure how feasible this is, but thought it would look cool.  But mostly I'm concerned about the swimming area.  I know a retangular tank would provide a longer stretch.  Any ideas would be greatly appreciated.

 

Well I found a 90 gallon Hex  that I thought would provide plenty of room for a 360 reef.  Other concern would be  flow but I was thinking of off setting a couple powerheads to provide a circular movement throughout the tank.  Not quite sure how I would plumb in the center overflow , but I don't think I would have a problem with that.  But the sump might be kinda tricky.  I definately think it would be a fun tank to build. 
Would definately have to set up a tank build.   I need to do that for my current tank still!! Ha