A/B cup + 475&500cc HP Silicone = DDD

Hello! I have been looking on this site and reading your reviews for months now! I am undergoing BA on April 10th this year (2014). This is something I have dreamed of forever and one day I woke up and told my husband... I'm doing it within 6 months. I started my search for a surgeon and found the one after a day. My decision was based on referral, as well as hundreds of 5 star reviews. I chose Dr. Aaron Gorin being that he seems to be the best doctor in Oregon.
I sent his office an email and was surprised to have gotten a personal response from Dr. Gorin himself. We set up my consult on a Sunday (which is the only time my hubby and I can make it in together, and Dr. Gorin came in on his day off...wow!) We started talking about my goal and sizes.
Here's where my problem is... I am a 32 b/a my right breast is considerably smaller then the left... When we sized, I loved the 530cc because it gave me more of an hourglass. But its hard to tell what it would look like without the granny bra and tank top. He told me his implants are in increments of 50, so my hubby and I decided a 500cc would be ideal. Now, I want to achieve a full DD. I don't want to be too close to an F. I have a smaller, athletic figure. I'm getting scared because people I've talked to who have had theirs done say 500cc with my build is too much. So I'm contemplating doing 450cc. Its not a huge difference but I don't want to regret my decision and wish I had gone larger. My pre-op appointment is 1 week prior to my surgery (which I wondered if I should do 2 weeks before?)
I was hoping someone out there could guide me a little more through this or give some advice? Thank you :)

Here is a picture of my figure & size currently and what I am trying to achieve...

Oops here's more