I think that only small-breasted women can really pull their bras up to nurse. If your breasts are too large, it may be impossible, or it would at least severely increase your chances of a plugged duct.
I only wear my Bravado under things like sweatshirts where you can't tell the breasts apart anyway. (I call what it does to me a uniboob.
) I do really like the Fancee Free bra that Captain Optimism linked to. I shop at the brick and morter store associated with that website. The lady who owns it is very nice and helpful. I do find that I wear one size larger in the Fancee Free than in other bras, so you may want to keep that in mind if you get one of those.
I only wear my Bravado under things like sweatshirts where you can't tell the breasts apart anyway. (I call what it does to me a uniboob.