glamour mom tanks are AWESOME! They're a bit pricey at 42.00 a pop, but they las FOREVER! I wore mine every day for 6 years. Eventually the elastic got scratchy and I had to junk them, but other wise they were still going strong.
I bought the ones from Target (Gilligan & O'Malley I think?) & looooved them. Comfiest nursing tanks; they looked great as a cami; they were long (big plus for me) and they were like $11 each. I would never pay a ton of money for a tank top...
I got my first set of nursing bras from walmart.com 2/$16 and they are alright. They work. They are relatively comfortable. Nothing amazing.
I went and decided to splurge a bit at Motherhood, and they make all the difference!! They are beautifully comfortable! I am a plus sized well endowed girl and they are so amazing! I love their nursing tanks too. I NEED tanks, cause I will not have my stomach showing while BFing. I am gonna have a cover, but it doesn't cover up my sides. Their bras and tanks are buy 3 get 1 free so of course I bought 4 of each! Ones I got - NECESSITY - WRAP SLEEP BRA! , Seamless clip down nursing bra - very nice one, Padded cup underwire nursing bra - Great for the necessity of having a "real" bra with the clips still there to BF, Sports clip down nursing bra - Will be for when I go exercising and every day so I don't feel like I have to change out of it in case baby is hungry. And the tanks they have are wonderful! Very comfortable! I don't always have a good amount of money, but I got 4 tanks, 4 wonderful bras, and a pair of jeans for $200 with the sale!