550 HP vs 700 UHP -- I'm worried that I won't be satisfied with 550cc, any suggestions?

In agreement with you, based on your own body pix and stats, your "dream" pix," and other submitted information, Ultra-High profile 700ml devices, well prepared for and placed, will more closely approximate your desired outcome.  There will be a six to twelve month period of skin and soft tissue expansion to accommodate such implants, during which time your breasts will not look like "dream" pix, but will be swollen, firm, and poorly defined.  Eventually however, if all goes well, they'll appear robust and feel more soft and natural.

It is very difficult without assessing you in person to know if the implant size and profile you mentioned will be a good size for you. Keep in mind that implant size selection not only depends on your personal preference, but it also depends on your unique measurements which can limit the implant size selected for you. There are various types of implants that can help you attain the look you are going for. A thorough consultation with a board certified plastic surgeon will allow you to communicate what your desired result is and will inform you as to what is possible to achieve your goals. We have a device called the Vectra 3D imaging system that shows you what you will look like with any implant. Our patients are very happy with the choice of implant they make when using this system. To learn more about breast augmentation, you can read “A Comprehensive Guide to Breast Augmentation.

I would caution the use of large volume and large diameter implants in your case - the distance from your infra-mammary fold to nipple looks quite short. Using a larger diameter implant may create problems with infra-mammary fold position. 

While implant size is a personal decision which is ultimately the patient's choice, there are limits to what can be safely accomplished(in a single procedure). A 700 cc implant is significant (800 cc is the max) and is likely much more than your envelope can accommodate in a single stage. The complication rate post augmentation increases with increased size. You might consider a smaller device to start with and allow for tissue expansion to accommodate your desired final implant.As always, discuss your concerns with a board certified plastic surgeon (ABPS).

Your surgeon has examined you and is likely recommending that size based on your breast measurements and skin stretch. The dream photos you attached may not be realistic for your body but you are probably right in that eventually you will want a larger implant. Placing an ultra high 650+cc range implant at a first time breast augmentation is asking for complications. Hope this helpsJosh Olson MD

To make sure that you have the right breast implant size, I strongly recommend that you use sizers and 3-dimensional pre-op imaging to pick your size.  If you have done this, and you would like a 700 cc implant and your surgeon does not agree with you, I recommend getting a second opinion.  The number one complaint after breast augmentation is size dissatisfaction.  You and your surgeon need to be on the same page.