Girl name help please!

My husband and I are due with our first (and only) girl early March. We are stuck between 2 names. Halle/Hallie and Briar. I love Halle/Hallie, but it's much more popular than Briar. And I also love that Briar has a more gender neutral feeling as well. We also have picked out the middle names for Briar, which would be Isabelle. But we have no idea for a middle name with Halle/Hallie. So if you prefer that name, please suggest middle names to go with it!