"Is it imporant for your partner to be a virgin before you marry?"
A few points...
Firstly, I don't know any virgins. This includes some muslims. That means I could not get married.
Try before you buy. The love between two lovers is a wonderfull thing... What if she was no good at it, or didn't like it?
Why are women meant to be Virgins, but it doesn't matter for the men?