I like Beauvallet too. Actually, I like them all, so. But I think you're right that there are period issues and quite a lot of gadzookery which may not be to everyone's taste. Plus the heroine is such a drip. ;)

I like April Lady. (see above). I agree about the heroine, but I quite like the secondary characters. And I'm a real sucker for 'married couple' stories. The Convenient Marriage and A Civil Contract are also high on my list for the same reason.