DD for me
From Weird Science: "If there's one thing I know, it's female stats. See, anything bigger than a handfull, you're risking a sprained thumb."
36C is about perfect. I've had my share of DD women but ultimately ended up with a 34B. In the long-term there's no sloppy joe action and at 5'9" she's got legs for days-- You can always upgrade later.