Which 'E' to match set?

[Brenton Carter]

w/ Permanent E: it brightens it up significantly, but the balance of tensions didn't seem to match. your bow arm probably could adapt to it and make it a bit smoother, but i still didn't want that bright of a sound. i just adapted my bow arm weight with the Flexocore E and it really has opened the string up: without getting too technical i generally think about pulling or coaxing the sound out of the strings, but with that stubborn E i put a little more shoulder and mid back weight into it as well as flatten my wrist (toward the pinky) out on the stick and pull from the outside of my right arm. (hmm i think i got technical whoops!)... it's important to stay relaxed and use natural weight. then again, i'm a player not a luthier. so, if no product recommendations work for you, try this. it may not work for you either, but anyway i'd put my recommendation behind the Perm' E.