Sports bra by Shock Absorber are good choice for everyday wear, if you have large cup size. Generic sports bras are not. Gap has several good models.
If you think having D-cup is good, you are a male under 14. Or Paul Rubens, which is unlikely, since he is several centuries dead. Welcome back, Paul. By the way, cup size has next to nothing to do with milk production when you need it. Or so I was told.
Choosing a bra is a problem: it has to look right, fit right, feel right, and for most models all of it is unpredictable before you try. Breast is an organ made mostly of fat. It has blood and lymph vessels inside and around. If the bra so tight it leaves red marks on your skin, it doesn't fit you. If it has great shape, it may be still worth wearing once in a while for occasion, but not as everyday bra. Not wearing a bra is not healthy, either, and very uncomfortable. With big size, not wearing a bra or wearing a wrong one will hurt your back.
Cheap (under $20) underwire bra may fit or may not. It will last about a month (the quality bras will last four to six month). Push-up bras are not for us evidently mammalian. I spent two hours in Victoria's Secret searching for something to wear under my clothes and left, frustrated. Gap has several seamless, or invisible models with hidden and padded wire that doesn't press on ribs ($50-$60, $40 on sale). I cannot recommend specific model because they are different as bodies are different. Besides band size and cup size (which can turn out different for different brands or models), breast can be set higher or lower and closer or further apart. Different models accommodate this differences, but there is no measurement to take. A friend of mine found that the bra that fitted her front was an inch short in band size, but the same model next band size didn't fit. She got herself bra band extension, sold in fabric store for $5 a piece.
Choose cotton/spandex with wide elastic straps for everyday wear, or, better yet, a sports bra. The generic sports bra is like a tight short A-shirt. It pushes both breasts to the middle and looks ugly. Shock Absorber brand makes synthetic elastic bras with seams, several models for different exercise levels, $50-$70, available to try on in Victoria's Secret. Victoria's Secrets' staff is clueless and intimidating and will not help with understanding manufacturer's jargon. The light impact activity model comes in black, white and natural (nude) and constructed like a normal no-wire bra with high neckline, but from more supportive material. It is not strong enough for playing frisbee, but lets you bend forward without falling out. The high impact models are much stronger. They come in black and in black with horrid energetic red or purple inserts. I assume they are meant to wear with no outer clothes, but never tried. The high impact support level 4 model feels like an armor. I felt absolutely comfortable doing handstands and cartwheels. Only my glasses keep falling off. Something has to be done -- follow updates!
My best bra-shopping experience happened in Ann Arbor's Briarwood Mall's Gap. The grandmotherly lady who helped in lingerie section there was really helpful, to the point of discouraging me from buying something for $60 I did like but already knew it was no good. If you are in Ann Arbor, go there before she retires.