Depends on what you are willing to spend. Sta-set works great and is the first choice for most sailors. You can't argue with the performance versus price ratio.
That beings said I absolutely LOVE my no stretch tech lines. One nice thing about them is that they don't get saturated when the are submerged or splashed. All my controls are VPC but New England Salsa has better hand feel and is the choice of most racers these days. I also have some New England Flight Line for my barber haulers which is super light and has extremely good hand feel.
I used to lace my tramp and run my jib wires with 1/4" Yale Vectrus, but the pure vectran tends to fray so I have since switched to Paraloc -Stingray. Stingray is pure dyneema but the weave makes it stay round and a grip thread makes it easy to tighten. It does creep a tiny bit under load but that's pretty easy to tighten up half way through the season. It is also discontinued to you can get it cheap at APS on closeout
http://www.apsltd.com/c-4751-line.aspx
All my halyards are now Paraloc - Piranha, again it holds it's shape really well and I got a good deal on closeout from APS.
Probably out of all of these the best place to use a high tech is in the halyards and tramp lacing where stretch is a real issue. For the control lines you won't notice the stretch as much so feel and comfort is really important. Sta-set is a good choice but so a high tech blend like Salsa or VPC - the really high tech lines are a waste of money for most of us. For the main halyard you will notice the stretch of a poly line like sta set and you may find raising your sail easier with a dyneema or vectran line (my old poly halyard would stretch like 2-3 feet when raising the mast). For halyards and tramp lacing you really want a line that has good grip, is really strong, holds its shape and doesn't stretch. Any dyneema or vectran blend will work for this but you really want a diameter of 1/4" or less if possible. The pure vectran or dyneema single braides aren't really the best choice for anything that you need to adjust as they tend to fray and flatten badly with handling.
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Dave Bonin
1981 Nacra 5.2 "Lucile"
1986 Nacra 5.7 "Belle"
Winnipeg, Manitoba, Canada
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