Minn Kota for me. I have the Terrova I-Pilot and love it. Before that I had a Minn Kota Powerdrive it was a good motor just wanted the I-pilot and moved up to 80 lb. thrust.
Prior to that I had a MG on another boat. It was dependable but I never really liked it. Speed control on it was not consistant and when I was in shallow water wanting to be as quite as possible on low speed it reminded me of a hay bailer.

Which ever you choose just make sure it is digital. Minn Kota seems to go a lot longer on less battery. But going digital also helps on the MG.

That my 2 cents worth.