Ladies with 550cc - 700cc High profile silicon implants.. Help

Hi Ladies I currently have silicon 325cc mod plus in one breast and 375cc in anther as one breast smaller than the other I am looking to get new implants soon and I WANT nice big perky fake breasts but i also dont want it to look stupid on me as im small my height is about 157cm and i weigh about 58kgs Please help with your advice on implants from 550cc - 700cc and your thoughts im currently thinking 600 in larger breast and 650 in the smaller however if in doubt go bigger so thats why im also thinking 650cc and 700cc my doctor said I cannot fit any bigger than 700cc Any comments or advice is appreicated  Thanks Ladies x