Keep this in mind... if you take good care of your rope, it will take care of you. If you take good care of it, it will never knot or tangle up. The expensive coated nontangle ropes are for the people who just pull it in ASAP and leave it on the ground of the boat for people to step on, and then weave the handle through the coils a couple times and then throw the handle out and expect to be ready to ride.
IMO
and I have never had a problem with a nice cheap non-stretch shoelace rope, because I coil it up perfectly every time I ride, and uncoil it properly before I ride.