Ava or Alaina?

Please help us decide between Ava Grace or Alaina Rae or maybe suggest something else. I LOVE, LOVE Ava but because of how popular it is now we have been reconsidering. Should it matter or should we go with it anyway? We already have a daughter named Alexis and am concerned that if we do go with Alaina it may be to close to her name. We are due any day so thank you for your opinions!!