I think we are going with Vivienne, it wasn't the pick at first, but grew on us. I am trying to stay away from anything too popular right now to try to avoid a "trendy" feel, otherwise I'd have picked Sophia. Another classic but also spunky name I am considering as a middle name is Inez. I did like Aria too, but I was worried it will sound too much like "area." One name we really liked at first due to its classic yet sweet feel is Helene.
Sorry... But is that the same as "Vivian" -- If so, I don't like the spelling but think it's a fine name. I think Lyra is pretty though -- That one or Aria would get my vote!