Out of the ones you listed, I've only heard of virgin mobile. They're okay, but you have to watch or for the service areas. Sometimes you get no service at all. Personally, I prefer Cingular, because if you don't use all of your minutes, they rollover so if you go over next month and have rollover minutes, it won't cost you extra money, unless you go over the rollover also. Plus they're not that expensive. I pay about $75 for two phone lines.