I promise not to be a forum hog, I just didn't want to post this without a bit of an update first.

I'm looking for the perfect white top, and Angie encouraged me to post this question here.

Details: I'm looking for a white top suitable for layering under an open light cardigan or jacket. The top has to be suitable for a proportionally larger bust and can't show any cleavage. I'd prefer a cotton or linen fabrication and nothing too tailored as I'm nursing a new baby and need to be able to both lift the shirt easily and layer a tank under.

Any suggestions? I've been looking all over online but haven't found anything that seems to tick all the right boxes.