looking to upgrade trolling motot on a jav 389. wondering what some of you other 389 owners have. Looking at the minn kota fortrex 80 in a 45 inch shaft, minn kota maxxum pro 80, minn kota maxxum 70, and motor guide.

concerned about about 80 thrust to much or 70 being to little
52 inch shaft to long
overall size of the troling motor when it is mounted,being to big on the boat.