Nursing Bras

So, I'm pretty busty & trying to pack my hospital bag and I'm wondering if I should buy a nursing bra yet....or wait until my milk comes in & I have a better idea of just how big these babies are gonna get? Or maybe buy an unpadded one just so I have one for the hospital? I went and looked yesterday and I just have no idea what to buy. I know I for sure want padding lol but right now I'm a 36DD and I don't want to buy a bra that I won't be able to use once my milk comes in. Any advice?