This is sure to start a Ford or Chevy fight - but last year when my Motor Guide trolling motor finally died (orginal equipment on my 97 TR-21) I replaced it with a 82lbs 24v Tour Edition Motor Guide.
I think the original was a 70lbs 24v and it took every bit of punishment I could give it until it finally died.
So far I've been happy with the new one - my only complaint is I've had to replace the prop - it doesn't seem as tough as the old one!