Re: How do you stow your tow ropes?
Tournament waterski ropes arn't supposed to stretch either.
Yes they are...
Even the sanctioning bodies address the stretch issue, and have written very specific allowable maximum stretch guidelines (generally 2.6% max allowable elongation at 250 lbs of tension), and they have specific method of measuring the stretch, for ropes used in tournament slalom skiing.
http://www.usawaterski.org/pages/TournKit/AKA/Technical/T.C. guidelines.pdf
The perfect amount of stretch for slalom is dictated by personal preference (within the rules). But I will doubt you'd find any tournament slalom skiier that would be happy with a non-stretch wakeboard style rope. Non-stretch rope would make it much more difficult to accellerate when exiting a turn, and likely would cause injuries. Stretch benefits slalomers.
The best wakeboarders generally want no stretch at all. Stretch can screw you up pretty bad. Imagine loading the rope heavy to get big air and then the rubber-band effect snaps your arms and body toward the boat about a foot and a half as soon as you leave the wake. Not good.
And all wakeboard tournament rules I've seen will specifically state that all ropes and handles must be made of a "non-stretch material". Spectra is often stated as a preferred material.
All that said, recreational skiiers won't notice much of a difference between ropes if you're not doing big air wakeboard tricks or running slalom courses at tournament speeds. Most just prefer the bigger handle of the Wakeboard rope because it's easier to grab behind the back and such...