My A string has just disintegrated on my violin. I usually get through strings about every three months. However when I bought new new violin a year ago it came strung up with Evah Pirazzi strings.
They are expensive but I have to say they are really worth it. These strings have been on my violin for a year. I play my violin a LOT. The fact they have lasted as long seems to make them worth every penny.
They sound pretty good too.