You are between sizes (I'm the same) so you need to try on both 32 & 34 band sizes as you are between the 2 - personally I would go for a 32 as they tend to soften & stretch with wear - you can always fasten it on the 2nd hook & eye
I would suggest trying on 32 J/K & 34H/I - but with Bravisimo theyre sizing is not really the norm so you will probably be looking at something like a 30M
Though I have to add I've been pretty unimpressed with Bravisimo - I bought into the hype a while back & I was very very disappointed, they sold me the most uncomfortable bra I have ever owned - I wore it enough to "break it in" & it still chaffs my arm pits & I would never go back.
I have noticed though, that because of the Bravisimo sizing hype, other companies sizing has changed - I've always bought a 32F, always fit like a glove (Bravissimo had me in a 30/G) - but going back to buy again, the F cup was too small & I have recently had to buy a 32/G cup to get the same fit
My size hasn't changed, they bra fit has - I am not a 32/G, but a measure as a 32F - its my trade too, so I do know what the measurements should mean.
Make sure when you try on that?
you lean forward & let your boobs fall into the cups.
Raise the straps so that the band sit straight around your body & level with your underbust
Wires sit flat to your ribs, not sitting on your bust, but around them IYSWIM
Buy a band thats a little tight - it will soften.
turn sideways to look in the mirror - you should have no bulging or gaping at the top of your cups.
the bra should sit flush to your underarms - again no "chicken wing" bulging - cup is too small - or rubbing & digging into under arm - cup is too big
HTH :)