I think Juniper sounds beautiful with Mirabel!
We are so far from deciding.
If it's a girl, my latest favourites are Una and Juniper. I really like Lilah, which was my grandmother's name, but it's just too common for hubs. I also have been liking Anneli and Kaisa.
For a boy, we were really set on Oren the first time around, but now we are going back and forth between Oren and Linus.
Either way, the baby will have two middle names, one from each side of the family, like big sister Mirabel. We're going to wait until we meet this one before deciding.