31yr Old Mother of 4 Boys 34a Considering 325 Mod or 425 Hp - Rockville, MD

I am 31 years old. With 4 boys(6, 3, &4month twins). I'm 5'6" and roughly 140lbs still have a few lbs to loose from my pregnancy. I am considering a BA since I've always wanted bigger breast. My ps and I have it narrowed down to 2 sizes.we are definitely doing silicon under the muscle. It's between 325 moderate profile and 425 high profile. The width is great now to decide between more natural or a sexier look. I'm leaning towards 425 hp