when should my mom come to help?

My husband and I live far from our immediate family. My mom is planning to come from across the country to help when our baby is born. We haven't set a date for her to arrive yet and I'm trying to decide whether we should have her come a little before my due date so she can be here for the birth, have her get on the next flight whenever I go into labor so she could potentially still be here for the birth or immediately after, or have her come after we've been home with the baby for a few days. I'm on the fence about having her in the delivery room -- I think it might mean a lot to her, but I also think it might be more special for my husband and I as a couple if it was just the two of us. I'm thinking the same thing about having her here as soon as we bring baby home -- maybe it would be nice for my husband and I to have a few days to ourselves? 

Originally we had discussed having her come about a week before my due date, but if I go overdue she could be here 2-3 weeks before the baby is even born and honestly I think we'll get sick of her by then, so I'd rather have her show up closer to the birth or shortly thereafter. She'll be staying in our house -- we have an extra guest room.

My husband will be home with me for the first 3 weeks, so we could wait and have my mom come after 2-3 weeks, so then she could be here to help me out when my husband goes back to work.

Any advice?