I may be a little biased but here's my opinion, take it FWIW. I started buying nursing bras my last trimester with DD and I have been in them since. I started with some ugly bras from Motherhood. I really hated that they were not sexy and attractive, and DH hated it more. Of course, they also fell apart pretty quickly. I went on my search for decent nursing bras that actually were attractive. I bought a Bravado. Now, it is my understanding that they have improved in the past few years, but I found it to be horribly uncomfortable and not supportive. I eventually found PassionSpice bras. I was in love. My DH and I latched on to the company and got involved. I quickly owned the entire nursing line and I have worn nothing else since. In fact, I loved them so much that when the people who founded the company decided they had had enough, I purchased the company. I would be glad to help you choose the proper size and style for you if you are interested in taking a look. The link to our nursing bras is in my signature.
I know how important it is to have a proper fitting bra during pregnancy and breastfeeding, so whatever bra you do decide to go with, just make sure it fits well!! I do have friends who chose soft cup bras they could just maneuver out of the way to nurse, but I always found that to be quite uncomfortable and quite difficult. Good Luck with your search, and let me know if you need some help! :-)