What's in a name

Our children's names are really important to me. We knew our boy and girl names before we decided to even start trying when we got pregnant with Libby. Now that our girl's name (Elizabeth) is taken, we have to come up with a new one. I have to admit I am struggling with this. I have lots of names I like but none are just standing out as the one. Jim is convinced the baby is a boy anyways so we won't have to worry about a girl's name but I want to have options ready in case it is a girl (which lets face it, we have a 50/50 shot =) ). So any opinions? We want something really classic and not horribly long since, lets face it, our last name is a doozy! These are the ones I am thinking about so far:

• Annie
• Cassandra (Would be Cassie for a nickname)
• Abby
• Maggie
• Margaret (call her Maggie)
• Anna
• Abigail (call her Abby)
• Emily
• Emma
• Ann

They are in no specific order at all. Opinions?