1. make sure you have the right size. Your band size=underbust. 90% of the support from your bra comes form your band, not the straps so this is an absolute must. If you need help with fit look
here.
2. DON'T even think about buying a sports bra that isn't by your bra size because they are a joke.
3. Read the
reviews linked on this page that include a number of sports bras made for busty women. Personally, I own a
Freya Active and LOVE it. I have had zero problems with bounce and I'm a 30H (I own the bra in a 30GG, though)!
ETA: Many of the bras in those reviews come with underwire and Freya Active has a few underwire bras!!!!