I am coming into the home stretch as far as getting my new tank drilled/plumbed into a sump/fuge...the last thing that I have to do is get a return pump. The tank is drill with two 1" drains and two 1" returns....it is a 38 gallon tank going to a 20long sump/fuge...The pumps that I have it narrowed down to are the Mag 5, Gen-X 2400 OR the Gen-X 4100...what is the popular opinion here... The head would be about 3ft...mabey 4 AT THE MOST....