I like Elomi 'Plunge*' styles - they work well with my bottom-heavy boobs.
This style is based on Sachi but comes up much bigger than my Sachi's (in Black, Navy and Red) I'm going to try a cup size down (JJ to J).
The (stretchy) strapping in the JJ is too high on me too so I'm hoping a J cup will fit a little lower (for winter wear a black version with high strapping wouldn't matter, but in white and in summer it's always going to be visible!)
(*NB. Elomi 'plunge' styles are not your usual plunge style - they have a much fuller cup, with a high apex (which I don't usually like!) and a low centre front.
Here Bravissimo are calling them a 'balconette', but Elomi's 'balconettes' like 'Cate', are different (from this shape) and don't fit me as well (fuller top cups perhaps?)
I don't find that Elomi's bras necessarily give me a great shape or lift (not like Candy Bliss/Lola did!) and, as usual, the wires are too wide, but I like them style-wise, especially if a J hook option is available (ie. Charley 'stretch') Plus the cups don't 'push' my boobs sideways by being too small and flat at the centre, like my Jenna's are now doing!
All in all, unless you're very full-on-top, you might try a cup size down (oh, and Elomi's backs are a bit generous too (go for your usual Fantasie back size)