Breast Implants: What should I ask for? Want: silicone implants, high up, round/full on top, close together (photo)

Bring goal photos to your consultation and try on sizers as a starting point. Opting for photos that mirror your chest size with your goal breast size/shape ensures you and your surgeon are aligned on the expected results.
As a general rule since you want less projection but a full upper pole, and an augmented look rather than a natural "slope" you likely want highly cohesive implants, a subglandular plane and a lower profile implant with your goal base width.
The attached link has a result that sounds like it may be similar to your goal.

Yes you could have Breast implants under the breast, 375-400 it will look really good, in your case I think it will be good high profile