I wear push-up bras with an underwire and no sports bras for me. I don't like them, I don't even like the racerback ones either. I stick to the traditional ones and I only get them from Walmart or Target. But I guess that's because I'm an A cup so nothing really bothers me.

I bought a bra from walmart about 6 months ago and it's still the same shape as when I first got it. The only thing showing wear is the metal clip part but you should always hand wash your bras, they'll last longer. That's my opinion though.