Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
If the pump is larger, and capable of moving the water from 2 drains, then having the center-pump style looks pretty good. Allows the drains at each end of the tank to flow into the sump with fewer fittings (always a good idea) and the pump can go up to the center of the tank (as long as there is not a support right there) to refill the tank.
Gives you more area to set up media, and the option of cleaning half at a time for less disturbance of the bacteria.
My tanks with sumps (I have 3 of them) have smaller pumps than that, entirely capable of moving all the water from just one drain. So I have them set up in more or less a straight line.