I have been using Silver Thread Excalliber for the past three years as my running line, and I have been really happy with it, using 4 lb test for winni. I get the bigger rolls (8 lbs?) and it goes a long way.

I tried Ande before that, it just didn't hold up well.

You can't go wrong with the Berkley XT either, but the silver thread is thinner and just as durable.

Avoid the Vanish as a running line, way too expensive and it just doesn't hold up well as a main/running line. I agree with YoAdrien, it make an ok leader, and that is what I use it for.