hi kwall! Much sympathy, I go totally with FGS, exactly my experience, I have the more expensive version of the sportjock, had those over your head with a little hook shockabsorber, fine for up to 1/2 hr, killer after. I 'm a 36 biggish b cup in real life, and I have the less deep of the 2 depths, if this makes sense.
Sportsbras.co.uk have a good site for comparing etc. Good luck!!