im looking for a good trolling motor for my 21ft triton to replace the old Minn kota on it, I've found a motorguide XI5 for sale locally that's about $1000 less than a minnkota. this MG is 105lb thrust 36volt. the question is how does the spot lock and gps features compare to minnkota? all my buddies have Minnkotas and they say that MG spot lock feature wont hold you within the same small area as a MK motor.. and that is a major reason I want a new trolling motor is I want the ability to stay in place over a brush pile or to be able to tell it to troll along a given path or direction. I've never had anything like that before and I'm sure its amazing I have a buddy and he just hits the spot lock and can measure fish, rebait etc and I'm always fighting the wind and current I'm sure you guys know how it is look down 2 seconds and you are 100ft from the brushpile. please any help I'd really appreciate it