For the past year I have primarily shot Josh Sowersby's (OliverStacy) strings with excellent results. Prior to that I had a Toelke Whip with Dan's endless loop string on it.....quiet!
About a month ago I ordered two of 3R's Lazer strings to test. Boy am I impressed. They're somewhat of a hybrid between endless loop and flemish. Made of 16 strands of Astroflight, these strings don't stretch at all....maybe 1/16" in the first 20 shots and that's it. I've put over 2000 shots through two strings and they've made my two take down longbows scary quiet with just two small wool puff silencers. I did have to put a drop of superglue on the bottom of the center serving of one string to keep it from untwisting when I waxed the string, but that's the only issue I've had.