Werner 24 ft. Aluminum Extension Ladder with 225 lb. Load Capacity Type II Duty Rating
This fella has just enough of the length I needed to reach the second story gutters in the rear comfortably, but only from the first floor patio deck in back, which is itself already elevated almost 6' off the ground.
It also reaches comfortably over the big shrubs and other plantings in front to get to the first level gutters.
I don't think the 20-footer would have worked as well.
The ladder is less than 35 lbs, but the gutter cleaning was still a two-man job.