Well, I've decided until Lily can fit into one size diapers, I will just keep her in prefolds with diaper covers. This is the most economical strategy. My plan is purcahasing the following:
24 orange newborn prefolds: http://www.greenmountaindiapers.com/diapers.htm
3-4 diaper covers: http://www.greenmountaindiapers.com/thirsties_duo.htm
2 snappis: http://www.greenmountaindiapers.com/other.htm#Snappis
That should do it until she's 10-15 pounds, then she can upgrade to Sunbabys!! I'm so excited! I can't wait for her to be here.