Susan & Lise -- CW-X just came out with a new version of their product for D-cup sizes! If it is as good as their standard B-C one, it would bear looking into.

They also have a new ventilator style with a mesh panel in front, and an all-mesh style as well, which sound very promising now that the hot, sticky days of summer are here. I plan on trying these two out. CW-X has moved to the top of my sports bra list.