That's a loaded question and answers will be opinions. I'd have to say Gator Line would be rated on top. I use Stihl X line. It will tackle most any thing you don't need a Blade for.
I like the 300 ft. roll of Arnold square string my brother I L gave me. It came in an auction box of STUFF and he couldn't use it in his little electric.
#4
exotion
Next to money is convenience so the closest place is home depot which sells my favorite echo crosscut echo line
