I'm a postdoc and have signed a contract with Tradiconsult (Student world wide cover). There was a 860 CHF for the first year offer in January 2008. Also my fiancée got insured by Tradiconsult (although they normally insure students, I got the impression that in the end they are happy with anyone with a B permit). The first 300 CHF a year (each) we will need to pay ourself. We thought that Tradiconsult is a good choice, as their office is walking distance here in Lausanne. I will let you know if we have trouble claiming expenses!