This question should be answered by the board certified plastic surgeon who is performing your surgery in March. Because they have seen you for a consultation, he or she would able to give the best and safest recommendation for your body type and what you're looking to achieve.
Thank you for the question.
To best help you, please send in some pictures consisting of a front, back, left and right side view of your body as well as your height and weight in order to determine which procedures and techniques would be best for your case and that way give you my most honest opinion.
It is certainly reasonable to get to your goal weight before having surgrery. But liposuction will not lift the breasts in any significant way.