A Dear BbxH,
Thank you for your question and pictures. Congratulations of your decision for surgery.
The indications for an augmentation-mastopexy (breast lift with an implant) is usually because you have volume deficiency and/or asymmetry of your breasts with accompanied ptosis (which is the sagging of the breast). From your pictures, I think you would be a good candidate for this procedure because you you do have some sagging. With a breast lift alone, you would have a better nipple and breast position but not the extra roundness on top nor an increase in volume.
If you want a larger volume with no change in where your nipple position lies, then an augmentation alone could achieve your goals.
You should consult with a board certified plastic surgeon who can give more detailed information after an examination and can answer all your concerns. You should be able to make a plan to achieve your goals together. Good luck!
Best wishes,
Dr. Suzette Miranda; Board Certified Plastic Surgeon