Just as a heads up, the EM strapless cut doesn't go up anywhere near your size, the biggest cup volume is 65GG/70G etc. The only strapless bras which will come in your size (28J ish) are the Bravissimo Contour Strapless and the Curvy Kate Luxe, neither of which have very good reviews in the larger cup sizes.

The BM cut is deep all over and has replaced the S cut as my favourite style of bra for everyday (not that I'm swimming in choices here exactly). It's moderately full coverage with a rounded shape, and the stretch lace will work on a bunch of shapes at the top of the bra. The gore is moderately low, but not as low as a Comexim bra with a lowered gore, but it's not a plunge bra, so that's kind of to be expected. I will add a few caveats to this. Firstly, you'll need to be a bit picky about what sort of straps you get. Some of the straps are just woefully inadequate for wear, and even with the straps loosened off all the way, they dig into my shoulders unpleasantly (Don't get the Bibi Bianka if you value your shoulders). Secondly, because the materials are soft and light, I find that the bra is a little jiggly. Not painful, but it certainly doesn't hold your breasts stock still either. Even though my breasts are close-set to the point of having a little bridge of tissue between them, the gore tacks in the BM cut for me. Which is both good and bad I guess. As much as a tacking gore is supportive, it's not great having the wires sit on breast tissue either. I guess there's no winning there. Overall, I do think that it's nice as an everyday style for larger breasts. I'd definitely order more when I need more bras (if I don't grow out of them, I'm wearing the largest cup volume as-is).There's a few reviews on Bratabase in the larger cup sizes, so it may be worth your while taking a look at these and the fit pics to see what you think.