29yo Mother of 3 Breastfed Kids, 5'5'' 155lbs gets 545cc HP Sientra silicone - Charlotte, NC

I'm a 29yo wife and mother of twin 10 month old babies and a 6yo. I never really had boobs; a small, tolerable size B. With my first child, I breastfed him for 8 months and I'd gone from 220lbs to 135. I'd swollen up to a DD when breastfeeding. Since I exercised like a maniac, my breast were left wrinkled and deflated from the weight loss and breastfeeding. Getting pregnant with twins took me to 245lbs and now I'm 155lbs and pretty fit. Now that I'm done having kids, I'm ready to have a sexier silhouette. I've always had hips and thighs and a flat stomach but now I need a nice rack. Since age 30 is around the corner, I want to look more Va-Va-Voom.
My first consult at Ballantyne Plastic Surgery was great. I decided I'd go with Dr. Thomas G. Liszka because my mother had a TT and lipo performed by him that turned out beautifully. After we checked into his office (which is beautiful), we waited for about 5 minutes and were called back. Dr. Liszka was super nice and professional. His staff is also very very professional. He made me feel relaxed and I knew he'd be taking good care of me. He confirmed the size that I'd written on my form and then he examined me. He told me that I was borderline on needing a lift (which I knew). He suggested a pursestring and anchor lift but told me that I could probably get away with getting a BA without a lift if I didn't want the lift but he said that I'd need one at some point, soon. He also said that if I decided to get one later, it would only cost me 2900. My mother kept telling the doctor that I didn't need too much bigger (she wants me to have a full B? What a waist)but I'm definitely going for a full D (even tho I said C to make her happy since she'd be paying).

So my stats are:
29yo
5'5"
155lbs
34B(barely)

I forgot to mention that my Preop is Feb 18. Sooooo excited! I know I'm going with silicone gummies. I'm thinking 400-425cc. Not sure:-/ but I have already purchased 2 new Under Armour zip front sports bras. One is a med-DDcup and the other is a 34C. I tried both of them on with a 34C-add 2 cup sz bra underneath. The med DD was perfectly snug with full coverage and the 34C was snug with a bit more of cleavage exposed (which is fine).