I've tried loads and loads of nursing and maternity bras.  I shot up from a size D to F during my pregnancy.  I was buying new bras about every 2-3 months until my size settled.  I had loads of issues with Motherhood Maternity bras, and other nursing bras.  For some reason manufacturers seem to think pregnant women's boobs stop at a D cup.

I tried different types of underwire and non-underwire, and found no luck.  Then, another gal in my birthing class suggested the Anita's bras for larger sized ladies.  Thank you to that woman, these are a godsend, literally.  They feel like a regular bra would with the added bonus of being a nursing bra.  They fit well under my shirts and the underwire is a bit softer, so I get the support I need without the poking feeling.  I was so impressed, I ordered a few different styles.  The money is WELL worth it for these.