I wouldn't worry about it hun. Things will probably change once you see the baby. We didn't have a name for baby #4 we were exactly the same as you. After she was born we trawled through the internet seperately and wrote down names we loved, names we liked and names we thought were ok. I think it was about 8 days after she was born we had narrowed it down to 3 names so we spoke to her using one of the names, then the other etc. We realised how much we actually like one name so that was it. We named her Leela.
It seems like this sort of "system" could work for you.