The lady named Linda, 2 posts above in the Hegre set "Poolside", got me thinking about how fit a lady can be, if she has large, lovely, and luscious breasts. After all, there is a bit of a "pulling in opposite directions" effect, in any lady like that. These are among the finest bodies I can recall seeing, in ladies with (what appear to be completely natural) D-cup breasts.
One other selection (I don't have any pics handy) is Wanda Curtis, who was INCREDIBLE when she first started in the adult film biz, mostly for Private (she has a very short thread here; try Eurobabes.com, etc, for more)
This first lady below is the same Linda as above, in another Hegre set, "Floating":
Angel, from Errotica-archives, "Easy". Super-fit? You decide. Super-fine? Absolutely; a world-class amazingly beautiful face.
This lady, Corinna, is one of Femjoy's all-time favorites. She has a LOT of picsets there, and has a large thread here on Peachy, at: http://peachyforum.com/forums/1/104547/ShowThread.aspx
And finally for now, this lady is Alena aka Angela. My best guess (and dang, I'd LOVE to get confirmation) is that she's somewhere between C and D cup sized. But seeing her proportions, she definitely qualifies as large-breasted in my mind. I don't know of ANY other woman who has breasts that size, COMBINED WITH an absolutely perfectly flat, toned, trim, and totally buff (even ripped) stomach. She has several other sets, listed in prior posts in this thread. These pics are from a pretty4ever set called "Summertime":