I don't think it is "unchristian" to want to marry a virgin. There are a whole bunch of reasons why it is a great thing to desire in a spouse - two virgins marrying is the original ideal after all, to be able to be literally exclusive and faithful to one person your whole life is awesome. As I mentioned in at least one and probably two of the other threads, I only have a problem with a "virgin only" requirement if it is held for judgemental or ungracious reasons. But that judgementalism is actually a separate issue.
From one of the other threads, there was a post seeming to indicate that a preference for a virgin was an unpopular opinion in the thread. Well, I don't see anything wrong with that hope in and of itself. I, for one, would like to marry a virgin. But it's not a make or break issue for me... and even if it IS a make or break issue for someone else, I don't have a problem with that or think it is unchristian as long as it isn't out of the judgemental type of motivation or something inconsistent with how we are to live as brothers and sisters with equal righteousness and purity in Christ, regardless of our sexual histories - and we all have those!
Makk