Ideal powerhead set up for a 55g tank

[bw2156]

I've experimented endlessly with powerhead configurations on my 55g 48" long reef tank. Curious to see what everyone's preferences are in an ideal scenario. We are also going to be pretending that corals are not yet in the tank to avoid the "it depends on the amount of flow each individual coral needs" conversation haha

 

[goodtimes]

In my 55 I have one wp25. I would like one more to have one at each end. I think that will be great flow without too many pumps in the tank.
One is actually enough without too many corals in the tank. I have my rock centered in the tank so I get good flow in both the front and back.