I have one of these 72-gallon bowfront tanks set up as a mixed fish/invert reef display.
I use a single Maxijet 1200 PH in one front corner, and a 600 in combination with a 400 placed side-by-side in the other front corner.
Using a Tsunami wavemaker, the 1200 is on for half of the time, alternating with the 600 and/or the 400 the rest of the time. (For you Tsunami owners, the Maxijet 400 is on outlet 1, the 1200 is on outlet 2, and the 600 is on outlet 3.)
This arrangement gives me nice alternating circulation, with a range of currents from very calm to medium turbulent, for keeping a broad mix of livestock. Just site things in the tank where they get the current they need or prefer.
For a tank with nothing delicate like my collection of giant feather duster worms, you could repalce the 600/400 combination with 600/600 or 900/400 for making stronger currents.
The Tsunami unit also provides a nice nightime calm effect using a light sensor that turns off all but one PH.