TM with spot lock for sure. You will use it all the time.
As for the issues with mounting these electric steer trolling motors or those of you that are concerned with how much the electric steer trolling motors protrude out from the boat, I created the LiftSaver TM Mount for the MG Xi5 but wanted to throw out that it also works for the MK Terrova, Ulterra, PD V2 and Riptide. It helps solve a lot of the mounting issues with these electric steer motors. Take a few minutes to look at the website and PM if I can answer any questions or help you out in any way.
www.liftsavertmmount.com