I have been purchasing my bras at Nordstroms for MANY years now (before it was all hyped up by Oprah even). They are VERY expensive, but I buy two or three and they last me a couple years as long as my weight doesn't change (LOL). I always get underwire (I never like wires until Nordstroms) and they never break through and poke me.
I used to have every department store credit card I could possibly have. I have closed all of them, except Nordi's. I kept that one so I can charge my bras and pay for them slowly. They are worth it to pay up to $60 for a good bra. They say you should rotate your bra so the elasticity does not get stretched out. So I have a nude and black one right now. I wear the nude under lighter tops and black under darker ones.
I even had to have my bras altered before because I was skinny around and big up front (not the case anymore, now I'm big all over). Also, when they take your measurements and decide on what size you'll be that doesn't mean you can go out and try on that size in all the bras. I've had 20 bras brought in all in the same size and only 5 fit me correctly. Each brand fits differently. I have had great success with getting fitted and purchasing my bras at Nordstroms. Not that I enjoy it, but it must be done.