What name sounds better with these siblings?

Please say what sounds better! Jack Christopher, Emma Claire, Ryan David, Sarah Michele, and Hannah Mackenzie are my childrens names. I am having a baby girl, April 16th. Here's what we like: Jack, Emma, Ryan, Sarah, Hannah and Ava Elizabeth. Jack, Emma, Ryan, Sarah, Hannah and Rebecca Joy (becca, say... show more Please say what sounds better!

Jack Christopher, Emma Claire, Ryan David, Sarah Michele, and Hannah Mackenzie are my childrens names. I am having a baby girl, April 16th.

Here's what we like:
Jack, Emma, Ryan, Sarah, Hannah and Ava Elizabeth.
Jack, Emma, Ryan, Sarah, Hannah and Rebecca Joy (becca, say it with becca, its cute!)
Jack, Emma, Ryan, Sarah, Hannah and Isabella Kate
Jack, Emma, Ryan, Sarah, Hannah and Leah Isabelle
Jack, Emma, Ryan, Sarah, Hannah and Laura Elizabeth

Which one? Please rate?
Update: see, we don't know if we like leah cuz its so common, with emma hannah and sarah...and i'm not sure, i really like laura or becca.
Update 2: my name is lauren, so it would be kind of special.
Update 3: Nata- thank you! :)that really means a lot.
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