There is a 3x increased chance of inadequate milk production following any kind of breast surgery according to the Institute of Medicine. So if you would like to breastfeed (which I agree is best for your baby) then you should probably avoid breast implants.
If you're looking to increase your bust size there are all kinds of non-surgical breast enhancement techniques, using bust enhancing bras and silicone padding. You would be surprised at how effective they are!