26 Y/o 34B --> BA 325cc Mod+ Silicone Submuscular - Atlanta, GA

I have been contemplating a BA since I was 18 years old and was convinced by my friends and family to wait until I was older to make the most mature decision I could. So 8 years later, after college and starting my career, I still feel the same way. I'm completely happy and confident with myself but this is just something I have always wanted and think I deserve to give myself. I have the support of my friends, family and boyfriend although my family took a little convincing. I have done all kinds of research on doctors, different surgical techniques, silicone vs saline, under vs over the muscle, etc. and have decided on the following:
--Silicone
--Mod plus profile
--Submuscular
--325cc
I'm currently a 34B although I don't normally fill out that cup size and can also wear a 34A. I'm hoping to achieve a full C or small D. I know cup size doesn't really equate to cc's but that's my goal. I'm afraid of going too big although all the doctors and most of the reviews say that it's better to go too big than too small. I had my pre-op appointment and decided on 325cc although I'm starting to think 300 would be more on the safe side. I just don't want it to be too obviously or "in your face". I'm a very active person and have an active job. Any thoughts on the size ladies? That's pretty much the only thing I'm still debating. But overall I'm so excited and READY!

So I had made an appointment with the surgeon to try on the sizers again next week because I kept doubting myself, but I decided today to just trust the surgeon and go with what he originally recommended which was 325 cc. This was actually on the smaller side of what he recommended so I think it's a good fit. I tried on some rice sizers with a very sheer bra so it looked more realistic. I think this made me feel better because I forgot to take pictures with the silicone implants in at the MD's office. I'm a very thorough person and like to look at all sides of everything and there's so many sides to this!

I bought some bras both from Walmart and Target (posting a picture). I was wondering if anyone had any other recommendations. Is it better for them to clasp in the front or the back? (even if you have someone to help) Is it better for them to be too tight or too loose? I'm keeping all the receipts but just didn't know if there's one that everyone just loved.

I'm posting more pics. Any comments are appreciated! What do you guys think of the sizers? They are 300 cc sizers which would equate to getting a 325 implant

Forgot to add on the last post that I'm 5'7" and 135 lbs

I can't believe my surgery is this Thursday! I'm so excited and hardly nervous. Any last minute advice? Can't wait!!!